0000790816-19-000007 | 10-Q | XBRL Viewer

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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2019	Oct. 18, 2019
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity Registrant Name	Brandywine Realty Trust
Entity Incorporation, State or Country Code	MD
Entity File Number	001-9106
Entity Tax Identification Number	23-2413352
Entity Address, Address Line One	2929 Walnut Street
Entity Address, Address Line Two	Suite 1700
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19104
City Area Code	610
Local Phone Number	325-5600
Title of 12(b) Security	Common Shares of Beneficial Interest
Trading Symbol	BDN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		176,194,918
Entity Central Index Key	0000790816
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Document Information [Line Items]
Entity Registrant Name	Brandywine Operating Partnership, L.P.
Entity Incorporation, State or Country Code	DE
Entity File Number	000-24407
Entity Tax Identification Number	23-2862640
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001060386

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Real estate investments:
Operating properties	$ 3,995,228	$ 3,951,719
Accumulated depreciation	(944,994)	(885,407)
Right of use asset - operating leases, net	21,828	0
Operating real estate investments, net	3,072,062	3,066,312
Construction-in-progress	151,232	150,263
Land held for development	92,189	86,401
Prepaid leasehold interests in land held for development, net	39,694	39,999
Total real estate investments, net	3,355,177	3,342,975
Assets held for sale, net	7,349	11,599
Cash and cash equivalents	29,925	22,842
Accounts receivable, net of allowance of $284 and $1,653 as of September 30, 2019 and December 31, 2018, respectively	13,872	16,394
Accrued rent receivable, net of allowance of $11,009 and $11,266 as of September 30, 2019 and December 31, 2018, respectively	168,960	165,243
Investment in Real Estate Ventures	127,759	169,100
Deferred costs, net	96,202	91,075
Intangible assets, net	95,798	131,348
Other assets	125,390	126,400
Total assets	4,020,432	4,076,976
LIABILITIES AND EQUITY
Mortgage notes payable, net	315,603	320,869
Unsecured credit facility	146,500	92,500
Unsecured term loan, net	248,430	248,042
Unsecured senior notes, net	1,367,722	1,366,635
Accounts payable and accrued expenses	119,790	125,696
Distributions payable	33,759	33,632
Deferred income, gains and rent	22,707	28,293
Acquired lease intangibles, net	24,050	31,783
Lease liability - operating leases	22,503	0
Other liabilities	16,931	18,498
Total liabilities	2,317,995	2,265,948
Commitments and contingencies (See Note 13)
Equity:
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 176,194,918 and 176,873,324 issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	1,763	1,770
Additional paid-in-capital	3,189,350	3,200,312
Deferred compensation payable in common shares	16,216	14,021
Common shares in grantor trust, 1,105,542 and 977,120 issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	(16,216)	(14,021)
Cumulative earnings	787,789	775,625
Accumulated other comprehensive income	(3,550)	5,029
Total Brandywine Operating Partnership, L.P.'s equity		1,796,316
Cumulative distributions	(2,284,610)	(2,183,909)
Total Brandywine Realty Trust's equity	1,690,742	1,798,827
Noncontrolling interests	11,695	12,201
Total beneficiaries' equity	1,702,437	1,811,028
Total partners' equity		1,798,508
Total liabilities and beneficiaries' equity	4,020,432	4,076,976
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,995,228	3,951,719
Accumulated depreciation	(944,994)	(885,407)
Right of use asset - operating leases, net	21,828	0
Operating real estate investments, net	3,072,062	3,066,312
Construction-in-progress	151,232	150,263
Land held for development	92,189	86,401
Prepaid leasehold interests in land held for development, net	39,694	39,999
Total real estate investments, net	3,355,177	3,342,975
Assets held for sale, net	7,349	11,599
Cash and cash equivalents	29,925	22,842
Accounts receivable, net of allowance of $284 and $1,653 as of September 30, 2019 and December 31, 2018, respectively	13,872	16,394
Accrued rent receivable, net of allowance of $11,009 and $11,266 as of September 30, 2019 and December 31, 2018, respectively	168,960	165,243
Investment in Real Estate Ventures	127,759	169,100
Deferred costs, net	96,202	91,075
Intangible assets, net	95,798	131,348
Other assets	125,390	126,400
Total assets	4,020,432	4,076,976
LIABILITIES AND EQUITY
Mortgage notes payable, net	315,603	320,869
Unsecured credit facility	146,500	92,500
Unsecured term loan, net	248,430	248,042
Unsecured senior notes, net	1,367,722	1,366,635
Accounts payable and accrued expenses	119,790	125,696
Distributions payable	33,759	33,632
Deferred income, gains and rent	22,707	28,293
Acquired lease intangibles, net	24,050	31,783
Lease liability - operating leases	22,503	0
Other liabilities	16,931	18,498
Total liabilities	2,317,995	2,265,948
Commitments and contingencies (See Note 13)
Redeemable limited partnership units at redemption value; 981,626 and 982,871 issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	14,728	12,520
Equity:
General Partnership Capital; 176,194,918 and 176,873,324 units issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	1,689,334	1,791,591
Accumulated other comprehensive income	(3,902)	4,725
Total Brandywine Operating Partnership, L.P.'s equity	1,685,432	1,796,316
Noncontrolling interest - consolidated real estate ventures	2,277	2,192
Total partners' equity	1,687,709	1,798,508
Total liabilities and beneficiaries' equity	$ 4,020,432	$ 4,076,976

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts receivable, allowance	$ 284	$ 1,653
Accrued rent receivable, allowance	$ 11,009	$ 11,266
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued and outstanding (in shares)	176,194,918	176,873,324
Common shares in grantor trust, issued and outstanding (in shares)	1,105,542	977,120
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Accounts receivable, allowance	$ 284	$ 1,653
Accrued rent receivable, allowance	$ 11,009	$ 11,266
Redeemable limited partnership units issued and outstanding (in units)	981,626	982,871
General partners' capital account, units issued and outstanding (in units)	176,194,918	176,873,324

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue
Rents	$ 139,228	$ 128,635	$ 415,113	$ 382,321
Total revenue	145,331	134,998	433,378	405,142
Operating expenses
Property operating expenses	38,358	37,852	116,542	115,109
Real estate taxes	15,247	12,433	47,119	37,272
Third party management expenses	2,469	2,612	7,035	9,605
Depreciation and amortization	55,627	44,141	158,738	131,631
General and administrative expenses	6,974	5,963	25,217	22,209
Provision for impairment	0	56,865	0	56,865
Total operating expenses	118,675	159,866	354,651	372,691
Gain on sale of real estate
Net gain (loss) on disposition of real estate	356	0	356	(35)
Net gain on sale of undepreciated real estate	250	0	1,501	2,859
Total gain on sale of real estate	606	0	1,857	2,824
Operating income (loss)	27,262	(24,868)	80,584	35,275
Other income (expense):
Interest income	558	1,220	1,636	2,564
Interest expense	(20,400)	(19,257)	(61,273)	(58,091)
Interest expense - amortization of deferred financing costs	(694)	(618)	(2,026)	(1,872)
Equity in (loss) income of Real Estate Ventures	(1,965)	1	(4,814)	(1,182)
Net gain on real estate venture transactions	2,059	0	3,594	37,263
Net income (loss) before income taxes	6,820	(43,522)	17,701	13,957
Income tax provision	0	0	(46)	(158)
Net income (loss)	6,820	(43,522)	17,655	13,799
Net (income) loss attributable to noncontrolling interests	(48)	342	(155)	(162)
Net income (loss) attributable to Brandywine Realty Trust	6,772	(43,180)	17,500	13,637
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(80)	(305)	(280)
Net income (loss) attributable to Common Shareholders of Brandywine Realty Trust	$ 6,679	$ (43,260)	$ 17,195	$ 13,357
Basic income per Common Share (in dollars per share)	$ 0.04	$ (0.24)	$ 0.10	$ 0.07
Diluted income per Common Share (in dollars per share)	$ 0.04	$ (0.24)	$ 0.10	$ 0.07
Basic weighted average shares outstanding (in shares)	176,195,244	178,602,622	176,066,507	178,515,993
Diluted weighted average shares outstanding (in shares)	176,750,600	178,602,622	176,617,726	179,752,544
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Rents	$ 139,228	$ 128,635	$ 415,113	$ 382,321
Total revenue	145,331	134,998	433,378	405,142
Operating expenses
Property operating expenses	38,358	37,852	116,542	115,109
Real estate taxes	15,247	12,433	47,119	37,272
Third party management expenses	2,469	2,612	7,035	9,605
Depreciation and amortization	55,627	44,141	158,738	131,631
General and administrative expenses	6,974	5,963	25,217	22,209
Provision for impairment	0	56,865	0	56,865
Total operating expenses	118,675	159,866	354,651	372,691
Gain on sale of real estate
Net gain (loss) on disposition of real estate	356	0	356	(35)
Net gain on sale of undepreciated real estate	250	0	1,501	2,859
Total gain on sale of real estate	606	0	1,857	2,824
Operating income (loss)	27,262	(24,868)	80,584	35,275
Other income (expense):
Interest income	558	1,220	1,636	2,564
Interest expense	(20,400)	(19,257)	(61,273)	(58,091)
Interest expense - amortization of deferred financing costs	(694)	(618)	(2,026)	(1,872)
Equity in (loss) income of Real Estate Ventures	(1,965)	1	(4,814)	(1,182)
Net gain on real estate venture transactions	2,059	0	3,594	37,263
Net income (loss) before income taxes	6,820	(43,522)	17,701	13,957
Income tax provision	0	0	(46)	(158)
Net income (loss)	6,820	(43,522)	17,655	13,799
Net income attributable to noncontrolling interests - consolidated real estate ventures	(11)	(20)	(58)	(46)
Net income attributable to Brandywine Operating Partnership	6,809	(43,542)	17,597	13,753
Nonforfeitable dividends allocated to unvested restricted shareholders	(93)	(80)	(305)	(280)
Net income (loss) attributable to Common Shareholders of Brandywine Realty Trust	$ 6,716	$ (43,622)	$ 17,292	$ 13,473
Basic income per Common Share (in dollars per share)	$ 0.04	$ (0.24)	$ 0.10	$ 0.07
Diluted income per Common Share (in dollars per share)	$ 0.04	$ (0.24)	$ 0.10	$ 0.07
Basic weighted average shares outstanding (in shares)	177,176,870	180,082,421	177,048,621	179,995,792
Diluted weighted average shares outstanding (in shares)	177,732,226	180,082,421	177,599,840	181,232,343
Third party management fees, labor reimbursement and leasing
Revenue
Service and other revenue	$ 4,938	$ 4,944	$ 14,041	$ 17,531
Third party management fees, labor reimbursement and leasing \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	4,938	4,944	14,041	17,531
Other
Revenue
Service and other revenue	1,165	1,419	4,224	5,290
Other \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Service and other revenue	$ 1,165	$ 1,419	$ 4,224	$ 5,290

Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2019

Sep. 30, 2018

Sep. 30, 2019

Sep. 30, 2018

Net income (loss)

$ 6,820

$ (43,522)

$ 17,655

$ 13,799

Comprehensive (loss) income:

Unrealized (loss) gain on derivative financial instruments

(1,586)

734

(9,209)

7,008

Amortization of interest rate contracts

^[1]

188

293

582

898

Comprehensive (loss) income:

(1,398)

1,027

(8,627)

7,906

Comprehensive income (loss)

5,422

(42,495)

9,028

21,705

Comprehensive income attributable to noncontrolling interest

(40)

333

(107)

(228)

Comprehensive income (loss) attributable to Brandywine Realty Trust

5,382

(42,162)

8,921

21,477

BRANDYWINE OPERATING PARTNERSHIP, L.P.

Net income (loss)

6,820

(43,522)

17,655

13,799

Comprehensive (loss) income:

Unrealized (loss) gain on derivative financial instruments

(1,586)

734

(9,209)

7,008

Amortization of interest rate contracts

^[1]

188

293

582

898

Comprehensive (loss) income:

(1,398)

1,027

(8,627)

7,906

Comprehensive income (loss)

5,422

(42,495)

9,028

21,705

Comprehensive income attributable to noncontrolling interest

(11)

(20)

(58)

(46)

Comprehensive income (loss) attributable to Brandywine Realty Trust

$ 5,411

$ (42,515)

$ 8,970

$ 21,659

[1]	Amounts reclassified from comprehensive income to interest expense within the Consolidated Statements of Operations.

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591552-111686

+ Details

Consolidated Statements of Beneficiaries' Equity - USD ($)	Total	Common Stock	Deferred Compensation Payable in Common Shares	Additional Paid-in Capital	Common Shares in Grantor Trust	Cumulative Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Distributions	Noncontrolling Interests
Beginning balance at Dec. 31, 2017	$ 1,826,870,000	$ 1,784,000	$ 12,445,000	$ 3,218,077,000	$ (12,445,000)	$ 641,093,000	$ 2,399,000	$ (2,053,741,000)	$ 17,258,000
Beginning balance (in shares) at Dec. 31, 2017		178,285,236	894,736
Net income (loss)	44,445,000					44,070,000			375,000
Other comprehensive income (loss)	5,008,000						4,966,000		42,000
Issuance of Common Shares of Beneficial Interest	416,000			416,000
Issuance of Common Shares of Beneficial Interest (in shares)		23,311
Issuance of partnership interest in consolidated real estate ventures	15,000								15,000
Distributions from consolidated real estate ventures	(54,000)								(54,000)
Share-based compensation activity	3,076,000	$ 1,000		3,072,000		3,000
Share-based compensation activity (in shares)		68,425
Share Issuance from/(to) Deferred Compensation Plan	0		$ 1,061,000		(1,061,000)
Share Issuance from/(to) Deferred Compensation Plan (in shares)		66,830	53,856
Share Choice Plan issuance (in shares)		(1,285)
Reallocation of Noncontrolling interest	0			(5,000)					5,000
Distributions declared	(32,525,000)							(32,259,000)	(266,000)
Ending balance at Mar. 31, 2018	1,847,251,000	$ 1,785,000	$ 13,506,000	3,221,560,000	(13,506,000)	685,166,000	7,365,000	(2,086,000,000)	17,375,000
Ending balance (in shares) at Mar. 31, 2018		178,442,517	948,592
Beginning balance at Dec. 31, 2017	1,826,870,000	$ 1,784,000	$ 12,445,000	3,218,077,000	(12,445,000)	641,093,000	2,399,000	(2,053,741,000)	17,258,000
Beginning balance (in shares) at Dec. 31, 2017		178,285,236	894,736
Net income (loss)	13,799,000
Other comprehensive income (loss)	7,906,000
Ending balance at Sep. 30, 2018	1,756,294,000	$ 1,787,000	$ 14,021,000	3,223,318,000	(14,021,000)	654,744,000	10,239,000	(2,150,463,000)	16,669,000
Ending balance (in shares) at Sep. 30, 2018		178,602,602	977,120
Beginning balance at Mar. 31, 2018	1,847,251,000	$ 1,785,000	$ 13,506,000	3,221,560,000	(13,506,000)	685,166,000	7,365,000	(2,086,000,000)	17,375,000
Beginning balance (in shares) at Mar. 31, 2018		178,442,517	948,592
Net income (loss)	12,876,000					12,747,000			129,000
Other comprehensive income (loss)	1,871,000						1,856,000		15,000
Issuance of partnership interest in consolidated real estate ventures	(4,000)								(4,000)
Share-based compensation activity	1,139,000	$ 1,000		1,135,000		3,000
Share-based compensation activity (in shares)		127,726
Share Issuance from/(to) Deferred Compensation Plan	(111,000)	$ 1,000	$ 530,000	(112,000)	(530,000)
Share Issuance from/(to) Deferred Compensation Plan (in shares)		34,230	33,713
Reallocation of Noncontrolling interest	0			2,000					(2,000)
Distributions declared	(32,497,000)							(32,230,000)	(267,000)
Ending balance at Jun. 30, 2018	1,830,525,000	$ 1,787,000	$ 14,036,000	3,222,585,000	(14,036,000)	697,916,000	9,221,000	(2,118,230,000)	17,246,000
Ending balance (in shares) at Jun. 30, 2018		178,604,473	982,305
Net income (loss)	(43,522,000)					(43,180,000)			(342,000)
Other comprehensive income (loss)	1,027,000						1,018,000		9,000
Issuance of partnership interest in consolidated real estate ventures	5,000								5,000
Share-based compensation activity	758,000			750,000		8,000
Share Issuance from/(to) Deferred Compensation Plan	0		$ (15,000)		15,000
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(1,871)	(5,185)
Reallocation of Noncontrolling interest	0			(17,000)					17,000
Distributions declared	(32,499,000)							(32,233,000)	(266,000)
Ending balance at Sep. 30, 2018	1,756,294,000	$ 1,787,000	$ 14,021,000	3,223,318,000	(14,021,000)	654,744,000	10,239,000	(2,150,463,000)	16,669,000
Ending balance (in shares) at Sep. 30, 2018		178,602,602	977,120
Beginning balance at Dec. 31, 2018	1,811,028,000	$ 1,770,000	$ 14,021,000	3,200,312,000	(14,021,000)	775,625,000	5,029,000	(2,183,909,000)	12,201,000
Beginning balance (in shares) at Dec. 31, 2018		176,873,324	977,120
Net income (loss)	4,583,000					4,523,000			60,000
Other comprehensive income (loss)	(2,483,000)						(2,469,000)		(14,000)
Repurchase and retirement of Common Shares of Beneficial Interest	(17,281,000)	$ (13,000)		(17,268,000)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)		(1,337,169)
Issuance of partnership interest in consolidated real estate ventures	22,000								22,000
Share-based compensation activity	3,677,000	$ 4,000		3,673,000
Share-based compensation activity (in shares)		465,883	41,342
Share Issuance from/(to) Deferred Compensation Plan	0		$ 619,000		(619,000)
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(458)	(5,920)
Reallocation of Noncontrolling interest	0			57,000					(57,000)
Distributions declared	(33,747,000)							(33,560,000)	(187,000)
Ending balance at Mar. 31, 2019	1,760,463,000	$ 1,761,000	$ 14,640,000	3,186,774,000	(14,640,000)	774,812,000	2,560,000	(2,217,469,000)	12,025,000
Ending balance (in shares) at Mar. 31, 2019		176,001,580	1,012,542
Beginning balance at Dec. 31, 2018	1,811,028,000	$ 1,770,000	$ 14,021,000	3,200,312,000	(14,021,000)	775,625,000	5,029,000	(2,183,909,000)	12,201,000
Beginning balance (in shares) at Dec. 31, 2018		176,873,324	977,120
Net income (loss)	17,655,000
Other comprehensive income (loss)	(8,627,000)
Repurchase and retirement of Common Shares of Beneficial Interest	$ (17,300,000)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	(1,337,169)
Ending balance at Sep. 30, 2019	$ 1,702,437,000	$ 1,763,000	$ 16,216,000	3,189,350,000	(16,216,000)	787,789,000	(3,550,000)	(2,284,610,000)	11,695,000
Ending balance (in shares) at Sep. 30, 2019		176,194,918	1,105,542
Beginning balance at Mar. 31, 2019	1,760,463,000	$ 1,761,000	$ 14,640,000	3,186,774,000	(14,640,000)	774,812,000	2,560,000	(2,217,469,000)	12,025,000
Beginning balance (in shares) at Mar. 31, 2019		176,001,580	1,012,542
Net income (loss)	6,252,000					6,205,000			47,000
Other comprehensive income (loss)	(4,746,000)						(4,720,000)		(26,000)
Issuance of partnership interest in consolidated real estate ventures	3,000								3,000
Redemption of LP Units	0			16,000					(16,000)
Redemption of LP Units (in shares)		1,245
Share-based compensation activity	1,451,000	$ 2,000		1,449,000
Share-based compensation activity (in shares)		94,150
Share Issuance from/(to) Deferred Compensation Plan	0		$ 1,599,000		(1,599,000)
Share Issuance from/(to) Deferred Compensation Plan (in shares)		100,908	100,908
Distributions declared	(33,758,000)							(33,571,000)	(187,000)
Ending balance at Jun. 30, 2019	1,729,665,000	$ 1,763,000	$ 16,239,000	3,188,239,000	(16,239,000)	781,017,000	(2,160,000)	(2,251,040,000)	11,846,000
Ending balance (in shares) at Jun. 30, 2019		176,197,883	1,113,450
Net income (loss)	6,820,000					6,772,000			48,000
Other comprehensive income (loss)	(1,398,000)						(1,390,000)		(8,000)
Repurchase and retirement of Common Shares of Beneficial Interest	0
Issuance of partnership interest in consolidated real estate ventures	2,000								2,000
Share-based compensation activity	1,105,000			1,105,000
Share Issuance from/(to) Deferred Compensation Plan	0		$ (23,000)		23,000
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(2,965)	(7,908)
Reallocation of Noncontrolling interest	0			6,000					(6,000)
Distributions declared	(33,757,000)							(33,570,000)	(187,000)
Ending balance at Sep. 30, 2019	$ 1,702,437,000	$ 1,763,000	$ 16,216,000	$ 3,189,350,000	$ (16,216,000)	$ 787,789,000	$ (3,550,000)	$ (2,284,610,000)	$ 11,695,000
Ending balance (in shares) at Sep. 30, 2019		176,194,918	1,105,542

Consolidated Statements of Beneficiaries' Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Distributions declared (in dollars per share)	$ 0.19	$ 0.19	$ 0.19	$ 0.18	$ 0.18	$ 0.18

Consolidated Statements of Partners' Equity - USD ($) $ in Thousands	Total	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	General Partner Capital	BRANDYWINE OPERATING PARTNERSHIP, L.P.	BRANDYWINE OPERATING PARTNERSHIP, L.P. Accumulated Other Comprehensive Income (Loss)	BRANDYWINE OPERATING PARTNERSHIP, L.P. Noncontrolling Interests	BRANDYWINE OPERATING PARTNERSHIP, L.P. General Partner Capital
Beginning Balance at Dec. 31, 2017					$ 1,799,955	$ 2,056	$ 2,215	$ 1,795,684
Beginning balance (in shares) at Dec. 31, 2017								178,285,236
Net income (loss)	$ 44,445		$ 375		44,445		5	$ 44,440
Other comprehensive income (loss)	5,008	$ 4,966	42		5,008	5,008
Share Issuance from/(to) Deferred Compensation Plan	0				0
Share Issuance from/(to) Deferred Compensation Plan (in shares)								66,830
Issuance of LP Units					416			$ 416
Issuance of LP Units (in shares)								23,311
Issuance of partnership interest in consolidated real estate ventures	15		15		15		15
Distributions from consolidated real estate ventures	(54)		(54)		(54)		(54)
Share Choice Plan issuance (in shares)								(1,285)
Share-based compensation activity	3,076				3,075			$ 3,075
Share-based compensation activity (in shares)								68,425
Adjustment of redeemable partnership units to liquidation value at period end					3,604			$ 3,604
Distributions declared to general partnership unitholders					(32,259)			(32,259)
Ending Balance at Mar. 31, 2018					1,824,205	7,064	2,181	$ 1,814,960
Ending balance (in shares) at Mar. 31, 2018								178,442,517
Beginning Balance at Dec. 31, 2017					1,799,955	2,056	2,215	$ 1,795,684
Beginning balance (in shares) at Dec. 31, 2017								178,285,236
Net income (loss)	13,799				13,799
Other comprehensive income (loss)	7,906				7,906
Ending Balance at Sep. 30, 2018					1,733,055	9,962	2,223	$ 1,720,870
Ending balance (in shares) at Sep. 30, 2018								178,602,602
Beginning Balance at Mar. 31, 2018					1,824,205	7,064	2,181	$ 1,814,960
Beginning balance (in shares) at Mar. 31, 2018								178,442,517
Net income (loss)	12,876		129		12,876		21	$ 12,855
Other comprehensive income (loss)	1,871	1,856	15		1,871	1,871
Share Issuance from/(to) Deferred Compensation Plan	(111)				(111)			$ (111)
Share Issuance from/(to) Deferred Compensation Plan (in shares)								34,230
Issuance of partnership interest in consolidated real estate ventures	(4)		(4)		(4)		(4)
Share-based compensation activity	1,139				1,140			$ 1,140
Share-based compensation activity (in shares)								127,726
Adjustment of redeemable partnership units to liquidation value at period end					(1,991)			$ (1,991)
Distributions declared to general partnership unitholders					(32,230)			(32,230)
Ending Balance at Jun. 30, 2018					1,805,756	8,935	2,198	$ 1,794,623
Ending balance (in shares) at Jun. 30, 2018								178,604,473
Net income (loss)	(43,522)		(342)		(43,522)		20	$ (43,542)
Other comprehensive income (loss)	1,027	1,018	9		1,027	1,027
Share Issuance from/(to) Deferred Compensation Plan	0				0
Share Issuance from/(to) Deferred Compensation Plan (in shares)								(1,871)
Issuance of partnership interest in consolidated real estate ventures	5		5		5		5
Share-based compensation activity	758				758			$ 758
Adjustment of redeemable partnership units to liquidation value at period end					1,264			1,264
Distributions declared to general partnership unitholders					(32,233)			(32,233)
Ending Balance at Sep. 30, 2018					1,733,055	9,962	2,223	$ 1,720,870
Ending balance (in shares) at Sep. 30, 2018								178,602,602
Beginning Balance at Dec. 31, 2018	1,798,508			$ 1,791,591	1,798,508	4,725	2,192	$ 1,791,591
Beginning balance (in shares) at Dec. 31, 2018								176,873,324
Net income (loss)	4,583		60		4,583		34	$ 4,549
Other comprehensive income (loss)	(2,483)	(2,469)	(14)		(2,483)	(2,483)
Share Issuance from/(to) Deferred Compensation Plan	0				0
Share Issuance from/(to) Deferred Compensation Plan (in shares)								(458)
Repurchase and retirement of LP units					(17,281)			$ (17,281)
Repurchase and retirement of LP units (in shares)								(1,337,169)
Issuance of partnership interest in consolidated real estate ventures	22		22		22		22
Share-based compensation activity	3,677				3,677			$ 3,677
Share-based compensation activity (in shares)								465,883
Adjustment of redeemable partnership units to liquidation value at period end					(3,088)			$ (3,088)
Distributions declared to general partnership unitholders					(33,560)			(33,560)
Ending Balance at Mar. 31, 2019					1,745,042	2,242	2,248	$ 1,740,552
Ending balance (in shares) at Mar. 31, 2019								176,001,580
Beginning Balance at Dec. 31, 2018	1,798,508			$ 1,791,591	1,798,508	4,725	2,192	$ 1,791,591
Beginning balance (in shares) at Dec. 31, 2018								176,873,324
Net income (loss)	17,655				17,655
Other comprehensive income (loss)	(8,627)				(8,627)
Ending Balance at Sep. 30, 2019					1,687,709	(3,902)	2,277	$ 1,689,334
Ending balance (in shares) at Sep. 30, 2019								176,194,918
Beginning Balance at Mar. 31, 2019					1,745,042	2,242	2,248	$ 1,740,552
Beginning balance (in shares) at Mar. 31, 2019								176,001,580
Net income (loss)	6,252		47		6,252		13	$ 6,239
Other comprehensive income (loss)	(4,746)	(4,720)	(26)		(4,746)	(4,746)
Share Issuance from/(to) Deferred Compensation Plan	0				0
Share Issuance from/(to) Deferred Compensation Plan (in shares)								100,908
Repurchase and retirement of LP units					0
Repurchase and retirement of LP units (in shares)								1,245
Issuance of partnership interest in consolidated real estate ventures	3		3		3		3
Share-based compensation activity	1,451				1,451			$ 1,451
Share-based compensation activity (in shares)								94,150
Adjustment of redeemable partnership units to liquidation value at period end					1,014			$ 1,014
Distributions declared to general partnership unitholders					(33,571)			(33,571)
Ending Balance at Jun. 30, 2019					1,715,445	(2,504)	2,264	$ 1,715,685
Ending balance (in shares) at Jun. 30, 2019								176,197,883
Net income (loss)	6,820		48		6,820		11	$ 6,809
Other comprehensive income (loss)	(1,398)	$ (1,390)	(8)		(1,398)	(1,398)
Share Issuance from/(to) Deferred Compensation Plan	0				0
Share Issuance from/(to) Deferred Compensation Plan (in shares)								(2,965)
Issuance of partnership interest in consolidated real estate ventures	2		$ 2		2		2
Share-based compensation activity	$ 1,105				1,105			$ 1,105
Adjustment of redeemable partnership units to liquidation value at period end					(695)			(695)
Distributions declared to general partnership unitholders					(33,570)			(33,570)
Ending Balance at Sep. 30, 2019					$ 1,687,709	$ (3,902)	$ 2,277	$ 1,689,334
Ending balance (in shares) at Sep. 30, 2019								176,194,918

Consolidated Statements of Partners' Equity (Parenthetical) - BRANDYWINE OPERATING PARTNERSHIP, L.P. - $ / shares	3 Months Ended			6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2018	Jun. 30, 2019
Distributions to general partnership unitholders (USD per share)	$ 0.19	$ 0.18	$ 0.18	$ 0.19
General Partner Capital
Distributions to general partnership unitholders (USD per share)	$ 0.19	$ 0.18	$ 0.18	$ 0.19

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 17,655	$ 13,799
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	158,738	131,631
Amortization of deferred financing costs	2,026	1,872
Amortization of debt discount/(premium), net	527	527
Amortization of stock compensation costs	6,145	5,143
Straight-line rent income	(8,287)	(10,102)
Amortization of acquired above (below) market leases, net	(7,236)	(2,313)
Ground rent expense	1,103	288
Provision for doubtful accounts	611	1,238
Net gain on real estate venture transactions	(3,594)	(37,263)
Net gain on sale of interests in real estate	(1,857)	(2,824)
Provision for impairment	0	56,865
Loss from Real Estate Ventures, net of distributions	5,134	2,811
Income tax provision	46	158
Changes in assets and liabilities:
Accounts receivable	2,086	4,165
Other assets	(13,089)	(9,831)
Accounts payable and accrued expenses	194	1,544
Deferred income, gains and rent	(3,640)	(3,461)
Other liabilities	(1,312)	290
Net cash provided by operating activities	155,250	154,537
Cash flows from investing activities:
Acquisition of properties	0	(40,240)
Proceeds from the sale of properties	41,546	16,771
Proceeds from real estate venture sales	675	42,953
Issuance of mortgage note receivable	0	(44,430)
Proceeds from repayment of mortgage notes receivable	3,341	141
Capital expenditures for tenant improvements	(53,383)	(43,142)
Capital expenditures for redevelopments	(33,905)	(31,312)
Capital expenditures for developments	(55,002)	(70,297)
Advances for the purchase of tenant assets, net of repayments	(178)	739
Investment in unconsolidated Real Estate Ventures	(253)	(646)
Deposits for real estate	(1,990)	(5,550)
Capital distributions from Real Estate Ventures	35,206	5,101
Leasing costs paid	(13,184)	(10,664)
Net cash used in investing activities	(77,127)	(180,576)
Cash flows from financing activities:
Repayments of mortgage notes payable	(5,669)	(4,972)
Proceeds from credit facility borrowings	333,000	0
Repayments of credit facility borrowings	(279,000)	0
Debt financing costs paid	0	(2,704)
Proceeds from the exercise of stock options	800	0
Proceeds from the issuance of common shares	0	416
Shares used for employee taxes upon vesting of share awards	(1,554)	(1,494)
Partner contributions to consolidated real estate venture	25	15
Partner distributions from consolidated real estate venture	0	(54)
Repurchase and retirement of common shares	(17,282)	0
Distributions paid to shareholders	(100,573)	(96,626)
Distributions to noncontrolling interest	(560)	(799)
Net cash used in financing activities	(70,813)	(106,218)
Increase (decrease) in cash and cash equivalents and restricted cash	7,310	(132,257)
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	22,842	202,179
Restricted cash, beginning of period	369	1,263
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents, end of period	29,925	70,360
Restricted cash, end of period	596	825
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2019 and 2018 of $2,246 and $2,578, respectively	56,455	52,888
Cash paid for income taxes	1,169	405
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	33,759	32,492
Change in construction-in-progress related to non-cash disposition of land	0	22,625
Change in deferred income, gains and rent to the non-cash disposition of land	0	(25,462)
Change in investment in real estate ventures as a result of dispositions	3,461	(17,313)
Change in operating real estate related to a non-cash acquisition of an operating property	0	(20,653)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,144)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	182
Change in investments in joint venture related to non-cash acquisition of property	0	(2,042)
Change in mortgage notes payable related to acquisition of an operating property	0	9,940
Change in capital expenditures financed through accounts payable at period end	(6,011)	992
Change in capital expenditures financed through retention payable at period end	(3,356)	2,352
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	17,655	13,799
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	158,738	131,631
Amortization of deferred financing costs	2,026	1,872
Amortization of debt discount/(premium), net	527	527
Amortization of stock compensation costs	6,145	5,143
Straight-line rent income	(8,287)	(10,102)
Amortization of acquired above (below) market leases, net	(7,236)	(2,313)
Ground rent expense	1,103	288
Provision for doubtful accounts	611	1,238
Net gain on real estate venture transactions	(3,594)	(37,263)
Net gain on sale of interests in real estate	(1,857)	(2,824)
Provision for impairment	0	56,865
Loss from Real Estate Ventures, net of distributions	5,134	2,811
Income tax provision	46	158
Changes in assets and liabilities:
Accounts receivable	2,086	4,165
Other assets	(13,089)	(9,831)
Accounts payable and accrued expenses	194	1,544
Deferred income, gains and rent	(3,640)	(3,461)
Other liabilities	(1,312)	290
Net cash provided by operating activities	155,250	154,537
Cash flows from investing activities:
Acquisition of properties	0	(40,240)
Proceeds from the sale of properties	41,546	16,771
Proceeds from real estate venture sales	675	42,953
Issuance of mortgage note receivable	0	(44,430)
Proceeds from repayment of mortgage notes receivable	3,341	141
Capital expenditures for tenant improvements	(53,383)	(43,142)
Capital expenditures for redevelopments	(33,905)	(31,312)
Capital expenditures for developments	(55,002)	(70,297)
Advances for the purchase of tenant assets, net of repayments	(178)	739
Investment in unconsolidated Real Estate Ventures	(253)	(646)
Deposits for real estate	(1,990)	(5,550)
Capital distributions from Real Estate Ventures	35,206	5,101
Leasing costs paid	(13,184)	(10,664)
Net cash used in investing activities	(77,127)	(180,576)
Cash flows from financing activities:
Repayments of mortgage notes payable	(5,669)	(4,972)
Proceeds from credit facility borrowings	333,000	0
Repayments of credit facility borrowings	(279,000)	0
Debt financing costs paid	0	(2,704)
Proceeds from the exercise of stock options	800	0
Proceeds from the issuance of common shares	0	416
Shares used for employee taxes upon vesting of share awards	(1,554)	(1,494)
Partner contributions to consolidated real estate venture	25	15
Partner distributions from consolidated real estate venture	0	(54)
Repurchase and retirement of common shares	(17,282)	0
Distributions paid to shareholders	(101,133)	(97,425)
Net cash used in financing activities	(70,813)	(106,218)
Increase (decrease) in cash and cash equivalents and restricted cash	7,310	(132,257)
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	22,842	202,179
Restricted cash, beginning of period	369	1,263
Cash and cash equivalents and restricted cash at beginning of year	23,211	203,442
Cash and cash equivalents, end of period	29,925	70,360
Restricted cash, end of period	596	825
Cash and cash equivalents and restricted cash at end of period	30,521	71,185
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2019 and 2018 of $2,246 and $2,578, respectively	56,455	52,888
Cash paid for income taxes	1,169	405
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	33,759	32,492
Change in construction-in-progress related to non-cash disposition of land	0	22,625
Change in deferred income, gains and rent to the non-cash disposition of land	0	(25,462)
Change in investment in real estate ventures as a result of dispositions	3,461	(17,313)
Change in operating real estate related to a non-cash acquisition of an operating property	0	(20,653)
Change in intangible assets, net related to non-cash acquisition of an operating property	0	(3,144)
Change in acquired lease intangibles, net related to non-cash acquisition of an operating property	0	182
Change in investments in joint venture related to non-cash acquisition of property	0	(2,042)
Change in mortgage notes payable related to acquisition of an operating property	0	9,940
Change in capital expenditures financed through accounts payable at period end	(6,011)	992
Change in capital expenditures financed through retention payable at period end	$ (3,356)	$ 2,352

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Capitalized interest	$ 1,465	$ 1,577
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Capitalized interest	$ 1,465	$ 1,577

Organization of the Parent Company and The Operating Partnership

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP

The Parent Company is a self-administered and self-managed real estate investment trust (“REIT”) that provides leasing, property management, development, redevelopment, acquisition and other tenant-related services for a portfolio of office, retail, and mixed-use properties. The Parent Company owns its assets and conducts its operations through the Operating Partnership and subsidiaries of the Operating Partnership. The Parent Company is the sole general partner of the Operating Partnership and, as of September 30, 2019, owned a 99.4% interest in the Operating Partnership. The Parent Company’s common shares of beneficial interest are publicly traded on the New York Stock Exchange under the ticker symbol “BDN”.

As of September 30, 2019, the Company owned 95 properties that contained an aggregate of approximately 16.7 million net rentable square feet (collectively, the “Properties”). The Company’s core portfolio of operating properties excludes development properties, redevelopment properties, and properties held for sale (the “Core Properties”). The Properties were comprised of the following as of September 30, 2019:



	Number of Properties	Rentable Square Feet
Office properties	87	15,509,004
Mixed-use properties	3	641,741
Retail property	1	17,884
Core Properties	91	16,168,629
Development property	1	204,108
Redevelopment properties	3	338,650
The Properties	95	16,711,387

In addition to the Properties, as of September 30, 2019, the Company owned 234.7 acres of land held for development, of which 35.2 acres were held for sale. The Company also held leasehold interests in two land parcels totaling 1.8 acres, each acquired through prepaid 99 years ground leases, and held options to purchase approximately 55.5 additional acres of undeveloped land. As of September 30, 2019, the total potential development that this inventory of land could support under current zoning and entitlements, including the parcels under option, amounted to an estimated 14.2 million square feet, of which 0.2 million square feet relates to 35.2 acres held for sale. As of September 30, 2019, the Company also owned economic interests in ten unconsolidated real estate ventures (collectively, the “Real Estate Ventures”) (see Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information). The Properties and the properties owned by the Real Estate Ventures are located in or near Philadelphia, Pennsylvania; Austin, Texas; Metropolitan Washington, D.C.; and Southern New Jersey and Wilmington, Delaware.

The Company conducts its third-party real estate management services business primarily through wholly-owned management company subsidiaries. As of September 30, 2019, the management company subsidiaries were managing properties containing an aggregate of approximately 24.6 million net rentable square feet, of which approximately 16.7 million net rentable square feet related to Properties owned by the Company and approximately 7.9 million net rentable square feet related to properties owned by third parties and Real Estate Ventures.

Unless otherwise indicated, all references in this Form 10-Q to square feet represent net rentable area.

Basis of Presentation

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

BASIS OF PRESENTATION

Basis of Presentation

The consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments consist solely of normal recurring matters, and result in a fair statement of the financial position of the Company as of September 30, 2019, the results of its operations for the three and nine months ended September 30, 2019 and 2018 and its cash flows for the nine months ended September 30, 2019 and 2018. The results of operations for such interim periods are not necessarily indicative of the results for a full year. These consolidated financial statements should be read in conjunction with the Parent Company’s and the Operating Partnership’s consolidated financial statements and footnotes included in their combined 2018 Annual Report on Form 10-K filed with the SEC on February 22, 2019.

The Company's Annual Report on Form 10-K for the year ended December 31, 2018 contains a discussion of our significant accounting policies under Note 2, "Summary of Significant Accounting Policies". Other than the adoption of ASU-2016-02, Leases (Topic 842), there have been no significant changes in our significant accounting policies since December 31, 2018.

The Company reclassified tenant reimbursements and termination fees from “Tenant reimbursements” and “Termination fees,” respectively, to “Rents” on the consolidated statements of operations as a result of the adoption of Topic 842. Prior periods have been revised to conform to current period presentation.

Revision of Previously Issued Financial Statements

The Company’s comparative 2018 results have been adjusted to correct for the effects of errors discovered during the second quarter of 2019 relating to the purchase price allocation and depreciable lives for two acquisitions made in a prior period. The Company has evaluated the impact of the errors to previously issued financial statements and concluded that the errors were immaterial to the previously issued financial statements; however, to correct the cumulative effect of the errors in 2019 would significantly impact the 2019 financial statements. Accordingly, the previously issued financial statements have been corrected. The corrections to the balance sheets include a reduction in cumulative earnings and operating properties and an increase to accumulated depreciation. The corrections to the prior period income statements result in an increase in depreciation and amortization and property operating expenses. In addition, the impact of an immaterial out of period depreciation adjustment, which was previously disclosed in the Company’s Quarterly Report on Form 10-Q for the three months ended March 31, 2019, has been reflected in the correct period.

The following tables and paragraphs present line items of the previously issued financial statements that have been corrected as a result of the revision:

Balance sheet impacts (in thousands):



	December 31, 2018
Balance Sheet:	As previously reported		Adjustments		As adjusted
Assets (Parent Company and Operating Partnership)
Operating properties	3,953,319		(1,600	)	3,951,719
Accumulated depreciation	(865,462	)	(19,945	)	(885,407	)
Operating real estate investments, net	3,087,857		(21,545	)	3,066,312
Total assets	4,098,521		(21,545	)	4,076,976

Equity (Parent Company)
Additional Paid-in Capital	3,200,850		(538	)	3,200,312
Cumulative Earnings	796,513		(20,888	)	775,625
Total Brandywine Realty Trust's equity	1,820,253		(21,426	)	1,798,827
Noncontrolling interests	12,320		(119	)	12,201
Total beneficiaries' equity	1,832,573		(21,545	)	1,811,028
Total liabilities and beneficiaries' equity	4,098,521		(21,545	)	4,076,976

Equity (Operating Partnership)
General Partnership Capital	1,813,136		(21,545	)	1,791,591
Total Brandywine Operating Partnership, L.P.'s equity	1,817,861		(21,545	)	1,796,316
Total partners' equity	1,820,053		(21,545	)	1,798,508
Total liabilities and partners' equity	4,098,521		(21,545	)	4,076,976

Statement of Beneficiaries’ / Partners’ Equity impacts (in thousands):



	Three and Nine Months Ended September 30, 2018
Brandywine Realty Trust	As previously reported	Adjustments		As adjusted
Statement of Beneficiaries' Equity:
Additional paid-in capital, beginning of period	3,218,564	(487	)	3,218,077
Cumulative earnings, beginning of period	660,174	(19,081	)	641,093
Noncontrolling interest, beginning of period	17,420	(162	)	17,258
Additional paid-in capital, March 31, 2018	3,222,047	(487	)	3,221,560
Cumulative earnings, March 31, 2018	704,506	(19,340	)	685,166
Noncontrolling interests, March 31, 2018	17,538	(163	)	17,375
Additional paid-in capital, June 30, 2018	3,223,072	(487	)	3,222,585
Cumulative earnings, June 30, 2018	717,515	(19,599	)	697,916
Noncontrolling interests, June 30, 2018	17,410	(164	)	17,246
Additional paid-in capital, September 30, 2018	3,223,817	(499	)	3,223,318
Cumulative earnings, September 30, 2018	674,599	(19,855	)	654,744
Noncontrolling interests, September 30, 2018	16,824	(155	)	16,669

Brandywine Operating Partnership
Statement of Partners' Equity:
Partner Capital, beginning of period	1,815,411	(19,727	)	1,795,684
Partner Capital, March 31, 2018	1,834,947	(19,987	)	1,814,960
Partner Capital, June 30, 2018	1,814,870	(20,247	)	1,794,623
Partner Capital, September 30, 2018	1,741,379	(20,509	)	1,720,870

Statement of Operations impacts:

Net income for the three and nine months ended September 30, 2018 has been reduced by $0.3 million and $0.8 million respectively, with a $0.01 decrease to basic and diluted income per common share and per common partnership unit for the nine months ended September 30, 2019. There was no change to any previously reported net income per share amount for the three months ended September 30, 2018.

There were no impacts to cash flows from operating activities in any period.

Adoption of New Accounting Guidance

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), modifying the principles for the recognition, measurement, presentation, and disclosure of leases for both parties to a contract (i.e., lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification determines whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and lease liability for all leases with a term of greater than twelve months regardless of their classification. Leases with a term of twelve months or less will be accounted for in the same manner as operating leases under ASC 840, Leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to previous guidance for sales-type leases, direct financing leases, and operating leases. The guidance supersedes previously issued guidance under ASC 840.

The Company adopted Topic 842 effective January 1, 2019. In applying the modified retrospective transition method, the Company elected the package of practical expedients available for implementation, which allows for the following:


•	An entity need not reassess whether any expired or existing contracts are or contain leases;


•	An entity need not reassess the lease classification for any expired or existing leases; and


•	An entity need not reassess initial indirect costs for any existing leases.

Furthermore, the Company elected the optional transition method to make January 1, 2019 the initial application date of the standard. This package of practical expedients allows entities to account for their existing leases for the remainder of their respective lease terms following the previous accounting guidance.

The Company also elected to adopt the optional transition practical expedient provided in ASU 2018-01 to not evaluate under Topic 842 for existing or expired land easements prior to the application date to determine if they meet the definition of a lease.

The Company also elected to adopt the practical expedient offered in ASU 2018-11 that allows lessors to not allocate the total consideration to lease and nonlease components, such as tenant reimbursements, based on their relative standalone selling prices as the timing and pattern of revenue recognition of the combined single lease component is the same and the leases are classified as operating leases.

The Company elected to adopt ASU 2018-20, which allows lessors to not evaluate whether certain sales taxes and other similar taxes are lessor costs or lessee costs. Instead, lessors will account for those costs as if they are lessee costs. All collections from lessees of taxes within the scope of the election are excluded from the consideration of the contract and from variable payments not included in the consideration of the contract.

Lessor accounting

The Company generates revenue under leases with tenants occupying the Properties. Generally, leases with tenants are accounted for as operating leases. As of September 30, 2019, the Company does not have any leases classified as direct-financing or sales-type leases. The operating leases have various expiration dates.

Lease payments on non-cancellable leases at September 30, 2019 are as follows (in thousands):



Year	Minimum Rent
2019 (three months remaining)	$	97,250
2020	386,991
2021	364,435
2022	324,296
2023	296,890
Thereafter	1,413,756
Total	$	2,883,618

Lease payments on non-cancellable leases at December 31, 2018 are as follows (in thousands):



Year	Minimum Rent
2019	$	392,058
2020	372,619
2021	349,160
2022	304,445
2023	277,388
Thereafter	1,265,810
Total	$	2,961,480

Fixed lease payments under tenant leases are recognized on a straight-line basis over the term of the related lease. The cumulative difference between lease revenue recognized under the straight-line method and contractual lease payments are recorded as “Accrued rent receivable” on the consolidated balance sheets. Variable lease payments are recognized as lease revenue in the period in which changes occur in facts and circumstances on which the variable lease payments are based.

In November 2018, the FASB issued ASU No. 2018-19, which clarifies that operating lease receivables are not within the scope of ASC 326-20 and should instead be accounted for under the new leasing standard, ASC 842. Topic 842 requires a binary approach to evaluating leases for collectability. Lessors are required to determine if it is probable that substantially all of the lease payments will be collected from the tenant over the lease term. Should the lessor determine that it is not probable that substantially all of the lease payments will be collected, the standard requires that the lessor write off any accrued rent receivable and begin recognizing lease payments on a cash basis. The Company has evaluated all leases for collectability and is recognizing lease payments for certain leases on a cash basis because collectability of substantially all of the lease payments is not probable. As a result, the write off of the accrued rent receivable of $0.7 million was recorded by the Company upon adoption of Topic 842 as a cumulative effect of accounting change adjustment to equity through “Cumulative earnings” on the consolidated balance sheets.

The Company’s lease revenue is impacted by the Company’s determination of whether improvements to the property, whether made by the Company or by the tenant, are landlord assets. The determination of whether an improvement is a landlord asset

requires judgment. In making this judgment, the Company’s primary consideration is whether an improvement would be utilizable by another tenant upon the then-existing tenant vacating the improved space. If the Company has funded an improvement that it determines not to be landlord assets, then it treats the cost of the improvement as a lease incentive. If the tenant has funded the improvement that the Company determines to be landlord assets, then the Company treats the costs of the improvement as deferred revenue and amortizes these costs into revenue over the lease term.

For certain leases, the Company also makes significant assumptions and judgments in determining the lease term, including assumptions when the lease provides the tenant with an early termination option or purchase option. The lease term impacts the period over which the Company determines and records lease payments and also impacts the period over which it amortizes lease-related costs. The Company considers all relevant factors that create an economic incentive for the lessee and uses judgment to determine if those factors, considered together, signify that the lessee is reasonably certain to exercise the option. For leases where a tenant executes a lease termination, termination fees are recognized over the modified term of the lease as rental income. Additionally, any deferred rents receivable are accelerated over the modified lease term.

The Company’s leases also typically provide for tenant reimbursement of a portion of common area maintenance expenses and other operating expenses to the extent that a tenant’s pro rata share of expenses exceeds a base year level set in the lease or to the extent that the tenant has a lease on a triple net basis. The Company also contracts with third-party vendors and suppliers for goods and services to fulfill certain of the Company’s obligations to tenants. Tenant reimbursements are billed in the period in which the related expenses are incurred.

The table below sets forth the allocation of lease revenue recognized between fixed contractual payments and variable lease payments (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
Lease Revenue	2019		2019
Fixed contractual payments	$	110,535	$	327,252
Variable lease payments	28,693		87,861
Total	$	139,228	$	415,113

Fixed lease payments include contractual rents under lease agreements with tenants recognized on a straight-line basis over the lease term, including amortization of lease incentives and above or below market rent intangibles, and parking income that is fixed under a long-term contract. Variable lease payments include reimbursements billed to tenants, termination fees, bad debt expense, and parking income that is not fixed under a long-term contract.

Lessee Accounting

The Company is the lessee under six long-term ground leases classified as operating leases. While adoption of the practical expedient allows the Company to not revisit the classification of existing leases, the Company measured the present value of the future lease payments for each ground lease agreement and recognized a right of use asset and lease liability in the aggregate amount of $22.4 million, each as of January 1, 2019 in accordance with Topic 842. The right of use assets and lease liabilities are presented as “Right of use asset – operating leases” and “Lease liability – operating leases”, respectively, on the consolidated balance sheet as of September 30, 2019.

The Company makes significant assumptions and judgments when determining the discount rate for the lease to calculate the present value of the lease payments. As the rate implicit in the lease is not readily determinable, the Company estimates the incremental borrowing rate (“IBR”) that it would need to pay to borrow, on a collateralized basis, an amount equal to the lease payments in a similar economic environment, over a similar lease term. The Company utilized a market-based approach to estimate the IBR for each individual lease. The base IBR was estimated utilizing observable mortgage and corporate bond rates, which were then adjusted to account for considerations related to the Company’s credit rating and the lease term to select an incremental borrowing rate for each lease.

The lease liabilities and right of use assets are amortized on a straight-line basis over the lease term with the corresponding expense classified in “Property operating expenses” on the consolidated statements of operations. Certain of the Company’s ground leases contain extension options and the Company considered all relevant factors in determining if it was reasonably certain that it would exercise such extension options. The Company concluded that it was not reasonably certain that it would exercise the extension options and, therefore, has not included the extension period in the remaining lease terms. With the exception of certain ground leases that are subject to rent increases periodically based on the CPI index, all lease payments under the ground lease are fixed. Topic 842 requires use of the most recent CPI adjustment when determining the present value of the lease payments for an indexed lease. As such, the 2018 CPI index was used to determine the right of use asset and corresponding lease liability as of January 1,

2019. Additional rent payments for amounts in excess of this estimated growth rate will be expensed on a cash basis as incurred and are considered variable lease costs.

The table below summarizes the Company’s operating lease cost (in thousands) recognized through “Property operating expenses” on the consolidated statements of operations:



	Three Months Ended September 30,			Nine Months Ended September 30,
Lease Cost	2019			2019
Fixed lease cost	$	525		$	1,575
Variable lease cost	13			41
Total	$	538		$	1,616

Weighted-average remaining lease term (years)	52.9
Weighted-average discount rate	6.3		%

Marine Piers Sublease Interest Sale

On March 15, 2017, the Company sold its sublease interest in the Piers at Penn’s Landing (the “Marine Piers”), which included leasehold improvements containing 181,900 net rentable square feet, and a marina, located in Philadelphia, Pennsylvania, for an aggregate sales price of $21.4 million. On the closing date, the buyer paid $12.0 million in cash and the Company received cash proceeds of $11.2 million, after closing costs and prorations. The $9.4 million balance of the purchase price was due on (a) January 31, 2020, in the event that the tenant at the Marine Piers did not exercise an option it held to extend the term of the sublease or (b) January 15, 2024, in the event that the tenant did exercise the option to extend the term of the sublease. In accordance with ASU 2017-05, the Company determined that it was appropriate to recognize the sale of the sublease interest in the Marine Piers and to defer the amount of the remaining $9.4 million balance due under the purchase and sale agreement until collectability can be determined.

During the first quarter of 2019, the tenant at the Marine Piers exercised its option to extend the term of its sublease. As a result, the $9.4 million balance of the purchase price is due on January 15, 2024, and the Company will recognize the additional gain on sale when the gain is realizable or realized.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments Credit Losses (Topic 326), which changes how entities measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The guidance replaces the current incurred loss model with an expected loss approach, resulting in more timely recognition of such losses. In November 2018, the FASB released ASU 2018-19, Codification Improvements to Topic 326, Financial Instrument - Credit Losses, which clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20. The guidance is effective for the Company on January 1, 2020. The Company is in the process of evaluating the impact of this new guidance on reserves for notes receivable, but does not anticipate that the guidance will have a material impact on its consolidated financial statements.

Real Estate Investments

9 Months Ended

Sep. 30, 2019

Real Estate [Abstract]

REAL ESTATE INVESTMENTS

As of September 30, 2019 and December 31, 2018, the gross carrying value of the operating properties was as follows (in thousands):



	September 30, 2019		December 31, 2018
Land	$	489,744	$	487,301
Building and improvements	3,049,606		3,048,889
Tenant improvements	455,878		415,529
Total	$	3,995,228	$	3,951,719

Dispositions

On September 11, 2019, the Company sold an office property in Vienna, Virginia known as 1900 Gallows Rd., which included 210,632 square feet of rentable space, for a total sales price of $36.4 million resulting in a loss on sale of $0.4 million after closing and other transaction related costs. During the three months ended September 30, 2019, the Company also received additional proceeds from a sale that closed in a prior year resulting in $0.7 million of additional gain on sale.

The Company sold the following land parcel and recognized a gain on a property sold in a prior year during the nine months ended September 30, 2019 (dollars in thousands):



Disposition Date	Property/Portfolio Name	Location	Number of Parcels	Acres	Sales Price		Net Proceeds on Sale		Gain on Sale
March 15, 2019	9 Presidential Boulevard	Bala Cynwyd, PA	1	2.7	$	5,325	$	5,023	$	751
January 8, 2015	Libertyview	Cherry Hill, NJ	—	—	—		—		750		(a)
Total Dispositions			1	2.7	$	5,325	$	5,023	$	1,501


(a)	As of January 2019, the Company expects to receive an additional $1.0 million of contingent consideration. The Company will recognize this consideration on a cash basis due to uncertainty of collectability. The $1.0 million consideration is payable to the Company in twelve equal installments, of which $0.8 million has been received during the nine months ended September 30, 2019.

Held for Sale

As of September 30, 2019, the Company determined that the sale of two parcels of land totaling 35.2 acres in the Other segment was probable and classified these properties as held for sale in accordance with applicable accounting standards for long-lived assets. As of September 30, 2019, $7.3 million was reclassified from “Land held for development” to “Assets held for sale, net” on the consolidated balance sheets. As of September 30, 2019, the fair value less the anticipated costs of sale of the properties exceeded the carrying values. As a result, the Company expects to record gains on sale. The fair value of the properties is based on the pricing in the purchase and sale agreement.

Investment in Unconsolidated Real Estate Ventures

9 Months Ended

Sep. 30, 2019

Equity Method Investments and Joint Ventures [Abstract]

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

As of September 30, 2019, the Company's aggregate investment balance in the Real Estate Ventures was $127.8 million. The Company formed or acquired interests in the Real Estate Ventures with unaffiliated third parties to develop or manage office, residential and/or mixed-use properties or to acquire land in anticipation of possible development of office, residential and/or mixed-use properties. As of September 30, 2019, six real estate ventures owned properties that contained an aggregate of approximately 5.6 million net rentable square feet of office space; two real estate ventures owned 1.4 acres of land held for development; one real estate venture owned 1.3 acres of land in active development; and one real estate venture owned a residential tower that contained 321 apartment units.

The Company accounts for its unconsolidated interests in the Real Estate Ventures using the equity method. The Company’s unconsolidated interests range from 15% to 70% and, in certain of the real estate ventures, are subject to specified priority allocations of distributable cash.

The Company earned management fees from its Real Estate Ventures of $1.0 million and $3.2 million for the three and nine months ended September 30, 2019, respectively, and $1.4 million and $4.0 million for the three and nine months ended September 30, 2018, respectively.

The Company earned leasing commission income from its Real Estate Ventures of $0.3 million and $0.8 million for the three and nine months ended September 30, 2019, respectively, and $1.5 million and $4.4 million for the three and nine months ended September 30, 2018, respectively.

The Company had outstanding accounts receivable balances from its Real Estate Ventures of $0.8 million as of both September 30, 2019 and December 31, 2018.

The amounts reflected in the following tables (except for the Company’s share of equity and income) are based on the financial information of the individual Real Estate Ventures. The Company does not record operating losses of a real estate venture in excess of its investment balance unless the Company is liable for the obligations of the real estate venture or is otherwise obligated to provide financial support to the real estate venture.

The following is a summary of the financial position of the Real Estate Ventures in which the Company held interests as of September 30, 2019 and December 31, 2018 (in thousands):



	September 30, 2019		December 31, 2018
Net property	$	841,743	$	835,983
Other assets (a)	351,364		159,499
Other liabilities (a)	289,952		85,681
Debt, net (b)	581,024		365,707
Equity (c)	322,131		544,094


(a)	The increase is due to the recording of lease related assets and liabilities of $197.1 million and $206.4 million, respectively, for MAP Venture in connection with the adoption of Topic 842.


(b)	The increase is due to third-party debt financing received by Herndon Innovation Center Venture during the three months ended March 31, 2019. See “Herndon Innovation Center Metro Portfolio Venture” section below for further information.

(c)

This amount includes the effect of the basis difference between the Company's historical cost basis and the basis recorded at the real estate venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials occur from the impairment of investments, purchases of third party interests in existing real estate ventures and upon the transfer of assets that were previously owned by the Company into a real estate venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the real estate venture level.

The following is a summary of results of operations of the Real Estate Ventures in which the Company held interests during the three and nine-month periods ended September 30, 2019 and 2018 (in thousands):



	Three Months Ended September 30, 2019
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			MAP Venture			Other			Total
Revenue	$	—		$	1,360		$	17,476		$	13,890		$	32,726
Operating expenses	—			(871		)	(11,981		)	(5,017		)	(17,869		)
Interest expense, net	—			(222		)	(2,436		)	(3,522		)	(6,180		)
Depreciation and amortization	—			(540		)	(6,247		)	(6,307		)	(13,094		)
Gain on early extinguishment of debt	$	—		$	4,371		$	—		$	—		$	4,371
Net income (loss)	$	—		$	4,098		$	(3,188	)	$	(956	)	$	(46	)
Ownership interest %	—		%	50		%	50		%	(b)			(b)
Company's share of net income (loss)	$	—		$	2,049		$	(1,594	)	$	(2,400	)	$	(1,945	)
Basis adjustments and other	—			31			(28		)	(23		)	(20		)
Equity in income (loss) of Real Estate Ventures	$	—		$	2,080		$	(1,622	)	$	(2,423	)	$	(1,965	)



	Three Months Ended September 30, 2018
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			MAP Venture			Other			Total
Revenue	$	14,232		$	5,962		$	17,243		$	4,580		$	42,017
Operating expenses	(6,428		)	(2,589		)	(10,219		)	(1,904		)	(21,140		)
Interest expense, net	(2,549		)	(873		)	(2,894		)	(1,228		)	(7,544		)
Depreciation and amortization	(4,896		)	(2,232		)	(4,654		)	(1,481		)	(13,263		)
Loss on early extinguishment of debt	—			—			(334		)	—			(334		)
Net income (loss)	$	359		$	268		$	(858	)	$	(33	)	$	(264	)
Ownership interest %	50		%	50		%	50		%	(b)			(b)
Company's share of net income (loss)	$	180		$	134		$	(429	)	$	(121	)	$	(236	)
Basis adjustments and other	243			31			(15		)	(22		)	237
Equity in income (loss) of Real Estate Ventures	$	423		$	165		$	(444	)	$	144		$	1



	Nine months ended September 30, 2019
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			evo at Cira Centre South (c)			MAP Venture			Other			Total
Revenue	$	—		$	5,050		$	—		$	53,560		$	42,538		$	101,148
Operating expenses	—			(2,473		)	—			(35,747		)	(15,736		)	(53,956		)
Interest expense, net	—			(698		)	—			(7,504		)	(8,219		)	(16,421		)
Depreciation and amortization	—			(2,055		)	—			(19,146		)	(19,078		)	(40,279		)
Loss on early extinguishment of debt	$	—		$	4,371		$	—		$	—		$	—		$	4,371
Net income (loss)	$	—		$	4,195		$	—		$	(8,837	)	$	(495	)	$	(5,137	)
Ownership interest %	—		%	50		%	—		%	50		%	(b)			(b)
Company's share of net income (loss)	$	—		$	2,098		$	—		$	(4,419	)	$	(2,444	)	$	(4,765	)
Basis adjustments and other	—			101			—			(69		)	(81		)	(49		)
Equity in income (loss) of Real Estate Ventures	$	—		$	2,199		$	—		$	(4,488	)	$	(2,525	)	$	(4,814	)



	Nine Months Ended September 30, 2018
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			evo at Cira Centre South (c)			MAP Venture			Other			Total
Revenue	$	42,492		$	17,768		$	995		$	50,976		$	13,708		$	125,939
Operating expenses	(18,245		)	(8,010		)	(250		)	(30,347		)	(5,145		)	(61,997		)
Interest expense, net	(7,070		)	(2,606		)	(388		)	(10,426		)	(3,132		)	(23,622		)
Depreciation and amortization	(15,622		)	(6,915		)	(376		)	(14,096		)	(4,430		)	(41,439		)
Loss on early extinguishment of debt	—			—			(718		)	(334		)	—			(1,052		)
Net income (loss)	$	1,555		$	237		$	(737	)	$	(4,227	)	$	1,001		$	(2,171	)
Ownership interest %	50		%	50		%	50		%	50		%	(b)			(b)
Company's share of net income (loss)	$	778		$	119		$	(369	)	$	(2,114	)	$	168		$	(1,418	)
Basis adjustments and other	378			33			11			(39		)	(147		)	236
Equity in income (loss) of Real Estate Ventures	$	1,156		$	152		$	(358	)	$	(2,153	)	$	21		$	(1,182	)


(a)	On December 11, 2018, the Company acquired from DRA Advisors, an unaffiliated third party, DRA’s 50% ownership interest in the G&I Austin Office LLC real estate venture. The DRA Austin Venture owned twelve office properties containing an aggregate 1,570,123 square feet, located in Austin, Texas. As a result of the acquisition, the Company acquired complete ownership of the Austin properties.


(b)	The Company’s unconsolidated ownership interests ranged from 15% to 70% during the three and nine months ended September 30, 2019 and 25% to 70% during the three and nine months ended September 30, 2018, subject to specified priority allocations of distributable cash in certain of the Real Estate Ventures.


(c)	The Company sold its 50% ownership interest in evo at Cira Centre South Venture during the first quarter of 2018.

Brandywine - AI Venture: 3130 Fairview Park Drive

On August 29, 2019, BDN – AI Venture transferred an office building located in Falls Church, Virginia and containing 180,659 rentable square feet to the mortgage lender in full satisfaction of the lender’s outstanding $26.0 million mortgage loan. The mortgage loan was nonrecourse to the Company. The Company recorded its $2.2 million share of the gain on debt forgiveness as "Net gain on real estate venture transactions" in its consolidated statements of operations for the three months ended September 30, 2019.

MAP Venture

The Company holds a 50% ownership interest in the MAP Ground Lease Venture LLC (the “MAP Venture”) which is the lessee under a 99 years ground lease of land parcels underlying 58 office properties owned by the MAP Venture. Upon adoption of Topic 842, Leases, on January 1, 2019, the MAP Venture determined that the carrying amount of the right of use asset was greater than the fair value of the underlying right of use asset. The fair value of the underlying right of use asset was determined using the purchase price paid by a third-party to acquire the ground lease. As a result, MAP Venture recorded a $9.2 million cumulative

effect of accounting change adjustment simultaneously with the recording of the right of use asset to reduce the value of the right of use asset to its estimated fair value. The Company recorded its $4.6 million proportionate share of the cumulative effect of accounting change adjustment through "Cumulative earnings” on its consolidated balance sheets.

Herndon Innovation Center Metro Portfolio Venture, LLC

On March 29, 2019, Herndon Innovation Center Metro Portfolio Venture, LLC (“Herndon Innovation Center Venture”), in which the Company holds a 15% ownership interest, obtained $134.1 million of third-party debt financing, secured by four properties within the venture, with an initial advance of $113.1 million. The remaining funds available under the loan have not yet been drawn. On April 1, 2019, the venture received $111.0 million in net cash proceeds from the financing. The Company received $16.7 million for its share of the cash proceeds on April 12, 2019. The loan bears interest at LIBOR + 1.95% capped at a total maximum interest rate of 5.45% - 6.45% over the term of the loan and matures on March 29, 2024. On April 11, 2019, the venture obtained an additional $115.3 million of third-party debt financing secured by the remaining four properties within the venture. The loan bears interest at LIBOR + 1.80% capped at a total maximum interest rate of 6.3% and matures on April 11, 2024. On April 12, 2019, the Company received $13.8 million for its share of the cash proceeds from the financing.

Guarantees

As of September 30, 2019, the Real Estate Ventures had aggregate indebtedness of $592.4 million. These loans are generally mortgage or construction loans, most of which are nonrecourse to the Company, except for customary carve-outs. As of September 30, 2019, the loans to Real Estate Ventures for which there is recourse to the Company consisted of the following: (i) a $0.3 million payment guarantee on a loan with a $3.7 million outstanding principal balance, provided to PJP VII; and (ii) up to a $41.3 million payment guarantee on a $150.0 million construction loan provided to 4040 Wilson. In addition, during construction undertaken by any of the Real Estate Ventures, including 4040 Wilson, the Company has provided and expects to continue to provide cost overrun and completion guarantees, with rights of contribution among partners or members in the Real Estate Ventures, as well as customary environmental indemnities and guarantees of customary exceptions to nonrecourse provisions in loan agreements.

Intangible Assets and Liabilities

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS AND LIABILITIES

As of September 30, 2019 and December 31, 2018, the Company’s intangible assets/liabilities were comprised of the following (in thousands):



	September 30, 2019
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	168,881	$	(74,951	)	$	93,930
Tenant relationship value	5,268		(4,728		)	540
Above market leases acquired	4,955		(3,627		)	1,328
Total intangible assets, net	$	179,104	$	(83,306	)	$	95,798

	Total Cost		Accumulated Amortization			Intangible Liabilities, net
Acquired lease intangibles, net:
Below market leases acquired	$	44,876	$	(20,826	)	$	24,050



	December 31, 2018
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	181,887	$	(53,376	)	$	128,511
Tenant relationship value	9,564		(8,551		)	1,013
Above market leases acquired	4,966		(3,142		)	1,824
Total intangible assets, net	$	196,417	$	(65,069	)	$	131,348

	Total Cost		Accumulated Amortization			Intangible Liabilities, net
Acquired lease intangibles, net:
Below market leases acquired	$	49,655	$	(17,872	)	$	31,783

As of September 30, 2019, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands):



	Assets		Liabilities
2019 (three months remaining)	$	10,057	$	1,696
2020	28,185		5,299
2021	18,289		3,890
2022	12,153		2,270
2023	9,236		1,722
Thereafter	17,878		9,173
Total	$	95,798	$	24,050

Debt Obligations

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

DEBT OBLIGATIONS

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at September 30, 2019 and December 31, 2018 (in thousands):



	September 30, 2019			December 31, 2018			Effective Interest Rate	Maturity Date
MORTGAGE DEBT:
Two Logan Square	$	81,535		$	82,805		3.98%	May 2020
Four Tower Bridge	9,351			9,526			4.50%	February 2021
One Commerce Square	117,486			120,183			3.64%	April 2023
Two Commerce Square	108,991			110,518			4.51%	April 2023
Principal balance outstanding	317,363			323,032
Plus: fair market value premium (discount), net	(1,477		)	(1,759		)
Less: deferred financing costs	(283		)	(404		)
Mortgage indebtedness	$	315,603		$	320,869

UNSECURED DEBT
$600 million Unsecured Credit Facility	$	146,500		$	92,500		LIBOR + 1.10%	July 2022
Seven-Year Term Loan - Swapped to fixed	250,000			250,000			2.87%	October 2022
$350.0M 3.95% Guaranteed Notes due 2023	350,000			350,000			3.87%	February 2023
$250.0M 4.10% Guaranteed Notes due 2024	250,000			250,000			4.33%	October 2024
$450.0M 3.95% Guaranteed Notes due 2027	450,000			450,000			4.03%	November 2027
$250.0M 4.55% Guaranteed Notes due 2029	250,000			250,000			4.60%	October 2029
Indenture IA (Preferred Trust I)	27,062			27,062			LIBOR + 1.25%	March 2035
Indenture IB (Preferred Trust I) - Swapped to fixed	25,774			25,774			3.30%	April 2035
Indenture II (Preferred Trust II) - Swapped to fixed	25,774			25,774			3.09%	July 2035
Principal balance outstanding	1,775,110			1,721,110
Plus: original issue premium (discount), net	(3,852		)	(4,096		)
Less: deferred financing costs	(8,606		)	(9,837		)
Total unsecured indebtedness	$	1,762,652		$	1,707,177
Total Debt Obligations	$	2,078,255		$	2,028,046

As of both September 30, 2019 and December 31, 2018, the Company’s weighted-average effective interest rates on its mortgage notes payable was 4.05%.

In addition to the debt described above, the Company utilizes borrowings under its unsecured revolving credit facility (the “Credit Facility”) for general business purposes, including to fund costs of acquisitions, developments and redevelopments of properties, fund share repurchases and to repay other debt. The Credit Facility provides for borrowings of up to $600.0 million and the per annum variable interest rate on borrowings is LIBOR plus 1.10%. The interest rate and facility fee are subject to adjustment upon a change in the Company’s unsecured debt ratings. During the nine months ended September 30, 2019, the weighted-average interest rate on Credit Facility borrowings was 3.5% resulting in $4.2 million of interest expense. As of September 30, 2019, the effective interest rate on Credit Facility borrowings was 3.2%. The Company had no borrowings under the Credit Facility as of and during the nine-months ended September 30, 2018.

The Parent Company unconditionally guarantees the unsecured debt obligations of the Operating Partnership (or is a co-borrower with the Operating Partnership) but does not by itself incur unsecured indebtedness. The Parent Company has no material assets other than its investment in the Operating Partnership.

The Company was in compliance with all financial covenants as of September 30, 2019. Certain of the covenants restrict the Company’s ability to obtain alternative sources of capital.

As of September 30, 2019, the Company’s aggregate scheduled principal payments of debt obligations are as follows (in thousands):



2019 (three months remaining)	$	1,926
2020	87,225
2021	15,143
2022	402,832
2023	556,737
Thereafter	1,028,610
Total principal payments	2,092,473
Net unamortized premiums/(discounts)	(5,329		)
Net deferred financing costs	(8,889		)
Outstanding indebtedness	$	2,078,255

Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

Financial assets and liabilities recorded on the consolidated balance sheets are categorized based on the inputs to the valuation techniques as follows:


•	Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access;

•

Level 2 inputs are inputs, other than quoted prices included in Level 1, which are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals; and


•	Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity or information.

The Company determined the fair values disclosed below using available market information and discounted cash flow analyses as of September 30, 2019 and December 31, 2018, respectively. The discount rate used in calculating fair value is the sum of the current risk free rate and the risk premium on the date of measurement of the instruments or obligations. Considerable judgment is necessary to interpret market data and to develop the related estimates of fair value. Accordingly, the estimates presented are not necessarily indicative of the amounts that the Company could realize upon disposition. The use of different estimates and valuation methodologies may have a material effect on the fair value amounts shown. The Company believes that the carrying amounts reflected in the consolidated balance sheets at September 30, 2019 and December 31, 2018 approximate the fair values for cash and cash equivalents, accounts receivable, other assets (except for the note receivable disclosed below), and accounts payable and accrued expenses. The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands):



	September 30, 2019				December 31, 2018
	Carrying Amount (a)		Fair Value		Carrying Amount (a)		Fair Value
Unsecured notes payable	$	1,289,112	$	1,366,900	$	1,288,024	$	1,262,570
Variable rate debt	$	473,540	$	456,478	$	419,153	$	402,924
Mortgage notes payable	$	315,603	$	320,761	$	320,869	$	318,515
Notes receivable	$	44,430	$	40,844	$	47,771	$	47,747


(a)	Amounts presented are net of deferred financing costs of $7.0 million and $7.9 million for unsecured notes payable, $1.6 million and $5.1 million for variable rate debt and $0.3 million and $0.4 million for mortgage notes payable as of September 30, 2019 and December 31, 2018, respectively.

On June 26, 2018, the Company provided a $44.4 million mortgage loan to Brandywine 1919 Ventures, an unconsolidated real estate venture in which the Company holds a 50% ownership interest, and recorded a note receivable of $44.4 million. Refer to Note 2 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 for further detail regarding this financing.

The Company used quoted market prices as of September 30, 2019 and December 31, 2018 to value the unsecured notes payable and, as such, categorized them as Level 2. For the fair value of the Company’s unsecured notes, the Company uses a discount rate based on the indicative new issue pricing provided by lenders.

The inputs utilized to determine the fair value of the Company’s mortgage notes payable and variable rate debt are categorized as Level 3. The fair value of the variable rate debt was determined using a discounted cash flow model that considered borrowing rates available to the Company for loans with similar terms and characteristics. The fair value of the mortgage notes payable was determined using a discounted cash flow model that considered the contractual interest and principal payments discounted at a blended market rate for loans with similar terms, maturities and loan-to-value. These inputs have been categorized as Level 3 because the Company considers the rates used in the valuation techniques to be unobservable.

The inputs utilized to determine fair value of the Company's notes receivable are unobservable and, as such, were categorized as Level 3. Fair value was determined using a discounted cash flow model that considered the contractual interest and principal payments discounted at a blended interest rate of the notes receivable.

For the Company’s level 3 financial instruments for which fair value is disclosed, an increase in the discount rate used to determine fair value would result in a decrease to the fair value. Conversely, a decrease in the discount rate would result in an increase to the fair value.

Disclosure about the fair value of financial instruments is based upon pertinent information available to management as of September 30, 2019 and December 31, 2018. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since September 30, 2019, and current estimates of fair value may differ from the amounts presented herein.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Limited Partners' Non-Controlling Interests in the Parent Company	9 Months Ended
	Sep. 30, 2019
Noncontrolling Interest [Abstract]
LIMITED PARTNERS' NON-CONTROLLING INTERESTS IN THE PARENT COMPANY	LIMITED PARTNERS' NON-CONTROLLING INTERESTS IN THE PARENT COMPANY Non-controlling interests in the Parent Company’s financial statements relate to redeemable common limited partnership interests in the Operating Partnership held by parties other than the Parent Company and properties which are consolidated but not wholly owned by the Operating Partnership. Operating Partnership The aggregate book value of the non-controlling interests associated with the redeemable common limited partnership interests in the accompanying consolidated balance sheet of the Parent Company was $9.4 million and $10.1 million as of September 30, 2019 and December 31, 2018, respectively. Under the applicable accounting guidance, the redemption value of limited partnership units are carried at, on a limited partner basis, the greater of historical cost adjusted for the allocation of income and distributions or fair value. The Parent Company believes that the aggregate settlement value of these interests, based on the number of units outstanding and the closing price of the common shares on the balance sheet dates as of September 30, 2019 and December 31, 2018, was approximately $14.9 million and $12.6 million, respectively.

Derivative Financial Instruments

9 Months Ended

Sep. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of September 30, 2019 and December 31, 2018. The notional amounts provide an indication of the extent of the Company’s involvement in these instruments at that time, but do not represent exposure to credit, interest rate or market risks (amounts presented in thousands and included in other assets and other liabilities on the Company’s consolidated balance sheets).



Hedge Product	Hedge Type	Designation		Notional Amount				Strike		Trade Date	Maturity Date	Fair value
				9/30/2019		12/31/2018						9/30/2019			12/31/2018
Assets
Swap	Interest Rate	Cash Flow	(a)	$	25,774	$	25,774	3.090	%	January 6, 2012	October 30, 2019	$	28		$	183

Liabilities
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000	2.868	%	October 8, 2015	October 8, 2022	$	(1,586	)	$	7,008
Swap	Interest Rate	Cash Flow	(a)	$	25,774	$	25,774	3.300	%	December 22, 2011	January 30, 2021	(99		)	292
				$	301,548	$	301,548


(a)	Hedging unsecured variable rate debt.

The Company measures its derivative instruments at fair value and records them in “Other assets” and (“Other liabilities”) on the Company’s consolidated balance sheets.

Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current

credit spreads to evaluate the likelihood of default by itself and its counterparties. The Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that the inputs utilized to determine the fair value of derivative instruments are classified in Level 2 of the fair value hierarchy.

Disclosure about the fair value of derivative instruments is based upon pertinent information available to management as of September 30, 2019 and December 31, 2018. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since September 30, 2019. Current estimates of fair value may differ from the amounts presented herein.

Beneficiaries Equity of the Parent Company

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

BENEFICIARIES' EQUITY OF THE PARENT COMPANY

BENEFICIARIES’ EQUITY OF THE PARENT COMPANY

Earnings per Share (EPS)

The following tables detail the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding):



	Three Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income (loss)	$	6,820		$	6,820		$	(43,522	)	$	(43,522	)
Net (income) loss attributable to noncontrolling interests	(48		)	(48		)	342			342
Nonforfeitable dividends allocated to unvested restricted shareholders	(93		)	(93		)	(80		)	(80		)
Net income (loss) attributable to common shareholders	$	6,679		$	6,679		$	(43,260	)	$	(43,260	)
Denominator
Weighted-average shares outstanding	176,195,244			176,195,244			178,602,622			178,602,622
Contingent securities/Share based compensation	—			555,356			—			—
Weighted-average shares outstanding	176,195,244			176,750,600			178,602,622			178,602,622
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	0.04		$	0.04		$	(0.24	)	$	(0.24	)



	Nine Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income	$	17,655		$	17,655		$	13,799		$	13,799
Net income attributable to noncontrolling interests	(155		)	(155		)	(162		)	(162		)
Nonforfeitable dividends allocated to unvested restricted shareholders	(305		)	(305		)	(280		)	(280		)
Net income attributable to common shareholders	$	17,195		$	17,195		$	13,357		$	13,357
Denominator
Weighted-average shares outstanding	176,066,507			176,066,507			178,515,993			178,515,993
Contingent securities/Share based compensation	—			551,219			—			1,236,551
Weighted-average shares outstanding	176,066,507			176,617,726			178,515,993			179,752,544
Earnings per Common Share:
Net income attributable to common shareholders	$	0.10		$	0.10		$	0.07		$	0.07

Redeemable common limited partnership units totaling 981,626 at September 30, 2019 and 1,479,799 at September 30, 2018, were excluded from the diluted earnings per share computations because they are not dilutive.

Unvested restricted shares are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the three and nine months ended September 30, 2019 and 2018, earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted shares issued to the Company’s executives and other employees under the Company's shareholder-approved long-term incentive plan.

Common Shares

On September 10, 2019, the Parent Company declared a distribution of $0.19 per common share, totaling $33.8 million, which was paid on October 17, 2019 to shareholders of record as of October 3, 2019.

The Parent Company maintains a common share repurchase program under which the Board of Trustees has authorized the Parent Company to repurchase common shares. On January 3, 2019, the Board of Trustees authorized the repurchase of up to $150.0 million common shares from and after January 3, 2019. During the nine months ended September 30, 2019, the Company repurchased and retired 1,337,169 common shares at an average price of $12.92 per share, totaling $17.3 million. There were no share repurchases during the three months ended September 30, 2019.

Partners Equity of The Operating Partnership

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

PARTNERS' EQUITY OF THE OPERATING PARTNERSHIP

PARTNERS’ EQUITY OF THE OPERATING PARTNERSHIP

Earnings per Common Partnership Unit

The following tables detail the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding):



	Three Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income (loss)	$	6,820		$	6,820		$	(43,522	)	$	(43,522	)
Net income attributable to noncontrolling interests	(11		)	(11		)	(20		)	(20		)
Nonforfeitable dividends allocated to unvested restricted unitholders	(93		)	(93		)	(80		)	(80		)
Net income (loss) attributable to common unitholders	$	6,716		$	6,716		$	(43,622	)	$	(43,622	)
Denominator
Weighted-average units outstanding	177,176,870			177,176,870			180,082,421			180,082,421
Contingent securities/Share based compensation	—			555,356			—			—
Total weighted-average units outstanding	177,176,870			177,732,226			180,082,421			180,082,421
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	0.04			0.04			(0.24		)	(0.24		)



	Nine Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income	$	17,655		$	17,655		$	13,799		$	13,799
Net income attributable to noncontrolling interests	(58		)	(58		)	(46		)	(46		)
Nonforfeitable dividends allocated to unvested restricted unitholders	(305		)	(305		)	(280		)	(280		)
Net income attributable to common unitholders	$	17,292		$	17,292		$	13,473		$	13,473
Denominator
Weighted-average units outstanding	177,048,621			177,048,621			179,995,792			179,995,792
Contingent securities/Share based compensation	—			551,219			—			1,236,551
Total weighted-average units outstanding	177,048,621			177,599,840			179,995,792			181,232,343
Earnings per Common Partnership Unit
Net income attributable to common unitholders	$	0.10		$	0.10		$	0.07		$	0.07

Unvested restricted units are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the three and nine months ended September 30, 2019 and 2018, earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted units issued to the Parent Company in connection with awards to the Parent Company’s executives and other employees under the Parent Company's shareholder-approved long-term incentive plan.

Common Partnership Units

On September 10, 2019, the Operating Partnership declared a distribution of $0.19 per common partnership unit, totaling $33.8 million, which was paid on October 17, 2019 to unitholders of record as of October 3, 2019.

In connection with the Parent Company’s common share repurchase program, one common unit of the Operating Partnership is retired for each common share repurchased. During the nine months ended September 30, 2019, the Company retired 1,337,169 common partnership units at an average price of $12.92 per unit, totaling $17.3 million, in connection with an equal number of share repurchases. There were no share repurchases during the three months ended September 30, 2019.

Segment Information

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

SEGMENT INFORMATION

As of September 30, 2019, the Company owns and manages properties within five segments: (1) Philadelphia Central Business District (Philadelphia CBD), (2) Pennsylvania Suburbs, (3) Austin, Texas (4) Metropolitan Washington, D.C. and (5) Other. The Philadelphia CBD segment includes properties located in the City of Philadelphia, Pennsylvania. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Austin, Texas segment includes properties in the City of Austin, Texas. The Metropolitan Washington, D.C. segment includes properties in the District of Columbia, Northern Virginia and southern Maryland. The Other segment includes properties located in Camden County in New Jersey and properties in New Castle County in Delaware. In addition to the five segments, the corporate group is responsible for cash and investment management, development of certain real estate properties during the construction period, and certain other general support functions. Land held for development and construction in progress is transferred to operating properties by region upon completion of the associated construction or project.

The following tables provide selected asset information and results of operations of the Company's reportable segments (in thousands):



Real estate investments, at cost:
	September 30, 2019		December 31, 2018
Philadelphia CBD	$	1,716,466	$	1,670,388
Pennsylvania Suburbs	1,005,332		1,002,937
Austin, Texas	719,441		667,698
Metropolitan Washington, D.C.	467,117		524,190
Other	86,872		86,506
	$	3,995,228	$	3,951,719

Right of use asset - operating leases, net (a)	$	21,828	$	—

Corporate
Construction-in-progress	$	151,232	$	150,263
Land held for development (b)	$	92,189	$	86,401
Prepaid leasehold interests in land held for development, net (c)	$	39,694	$	39,999


(a)	On January 1, 2019, as a result of the adoption of Topic 842, Leases, the Company recognized operating ground leases for which it is a lessee on its consolidated balance sheets. See Note 2, “Basis of Presentation,” for further information.

(b)

As of September 30, 2019, the Company categorized 35.2 acres of land held for development, located in the Other segment, as held for sale in accordance with applicable accounting standards for long lived assets. As of December 31, 2018, the Company categorized 37.9 acres of land held for development, comprised of 2.7 acres and 35.2 acres, located in the Pennsylvania Suburbs segment and Other segment, respectively, as held for sale in accordance with applicable accounting standards for long lived assets. See Note 3, “Real Estate Investments,” for further information.


(c)	As of September 30, 2019 and December 31, 2018, this caption comprised leasehold interests in prepaid 99-year ground leases at 3025 and 3001-3003 JFK Boulevard, in Philadelphia, Pennsylvania.

Net operating income (in thousands):



	Three Months Ended September 30,
	2019								2018
	Total revenue		Operating expenses (a)			Net operating income (loss)			Total revenue		Operating expenses (a)			Net operating income (loss)
Philadelphia CBD	$	66,105	$	(24,773	)	$	41,332		$	64,352	$	(24,427	)	$	39,925
Pennsylvania Suburbs	34,818		(11,667		)	23,151			34,745		(11,956		)	22,789
Austin, Texas (b)	26,280		(9,302		)	16,978			8,641		(3,894		)	4,747
Metropolitan Washington, D.C. (c)	13,179		(5,999		)	7,180			22,754		(8,548		)	14,206
Other	3,706		(2,691		)	1,015			3,707		(2,436		)	1,271
Corporate	1,243		(1,642		)	(399		)	799		(1,636		)	(837		)
Operating properties	$	145,331	$	(56,074	)	$	89,257		$	134,998	$	(52,897	)	$	82,101



	Nine Months Ended September 30,
	2019								2018
	Total revenue		Operating expenses (a)			Net operating income (loss)			Total revenue		Operating expenses (a)			Net operating income (loss)
Philadelphia CBD	$	196,859	$	(75,311	)	$	121,548		$	190,478	$	(73,559	)	116,919
Pennsylvania Suburbs	104,744		(36,466		)	68,278			103,960		(37,075		)	66,885
Austin, Texas (b)	77,234		(28,182		)	49,052			25,474		(10,812		)	14,662
Metropolitan Washington, D.C. (c)	40,372		(18,542		)	21,830			69,012		(25,699		)	43,313
Other	10,352		(7,226		)	3,126			13,187		(9,601		)	3,586
Corporate	3,817		(4,969		)	(1,152		)	3,031		(5,240		)	(2,209		)
Operating properties	$	433,378	$	(170,696	)	$	262,682		$	405,142	$	(161,986	)	$	243,156


(a)	Includes property operating expenses, real estate taxes and third party management expense.


(b)	On December 11, 2018, the Company acquired from DRA Advisors, an unaffiliated third party, DRA’s 50% ownership interest in the G&I Austin Office LLC real estate venture. The DRA Austin Venture owned twelve office properties containing an aggregate 1,570,123 square feet, located in Austin, Texas. As a result of the acquisition, the Company acquired complete ownership of the Austin properties.


(c)	On December 20, 2018, the Company contributed a portfolio of eight properties containing an aggregate of 1,293,197 square feet, located in its Metropolitan Washington, D.C. segment, known as the Rockpoint Portfolio, to the Herndon Innovation Center Venture. The Company and its partner own 15% and 85% interests in the Herndon Innovation Center Venture, respectively.



Unconsolidated real estate ventures (in thousands):
	Investment in real estate ventures				Equity in income (loss) of real estate venture
	As of				Three Months Ended September 30,						Nine Months Ended September 30,
	September 30, 2019		December 31, 2018		2019			2018			2019			2018
Philadelphia CBD	$	18,114	$	19,897	$	55		$	(36	)	$	217		$	(183	)
Metropolitan Washington, D.C. (a) (b)	106,111		136,142		(528		)	(31		)	(963		)	(431		)
MAP Venture (c)	1,620		11,173		(1,602		)	(444		)	(4,414		)	(2,011		)
Other	1,914		1,888		110			89			346			287
Austin, Texas (d)	—		—		—			423			—			1,156
Total	$	127,759	$	169,100	$	(1,965	)	$	1		$	(4,814	)	$	(1,182	)


(a)	On December 20, 2018, the Company formed the Herndon Innovation Center Venture. See footnote (c) to the “Net operating income” table above for further information regarding this transaction.


(b)	On August 29, 2019, BDN – AI Venture transferred an office building to the lender in full satisfaction of the outstanding mortgage loan. Refer to Note 4, “Investment in Unconsolidated Real Estate Ventures” for further information.


(c)	Represents a joint venture formed on February 4, 2016 between the Company and MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff Capital Management Group, LLC. The business operations, including properties in Richmond,

Virginia; Metropolitan Washington, D.C.; New Jersey/Delaware and Pennsylvania Suburbs, are centrally managed with the results reported to management of the Company on a consolidated basis. As a result, the Company’s investment in MAP Venture is separately presented. All other unconsolidated real estate ventures are managed consistently with the Company’s regional segments.


(d)	On December 11, 2018, the Company acquired from DRA Advisors, an unaffiliated third party, DRA’s 50% ownership interest in the G&I Austin Office LLC real estate venture. The DRA Austin Venture owned twelve office properties containing an aggregate 1,570,123 square feet, located in Austin, Texas. As a result of the acquisition, the Company acquired complete ownership of the Austin properties.

Net operating income (“NOI”) is a non-GAAP financial measure defined as total revenue less property operating expenses, real estate taxes and third party management expenses. Property operating expenses that are included in determining NOI consist of costs that are necessary and allocable to our operating properties such as utilities, property-level salaries, repairs and maintenance, property insurance and management fees. General and administrative expenses that are not reflected in NOI primarily consist of corporate-level salaries, amortization of share awards and professional fees that are incurred as part of corporate office management. All companies may not calculate NOI in the same manner. NOI is the measure that is used by the Company’s management to evaluate the operating performance of the Company’s real estate assets by segment. The Company believes NOI provides useful information to investors regarding the financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. While NOI is a relevant and widely used measure of operating performance of real estate investment trusts, it does not represent cash flow from operations or net income as defined by GAAP and should not be considered as an alternative to those measures in evaluating our liquidity or operating performance. NOI does not reflect interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs. The Company believes that net income (loss), as defined by GAAP, is the most appropriate earnings measure. The following is a reconciliation of consolidated net income, as defined by GAAP, to consolidated NOI, (in thousands):



	Three Months Ended September 30,					Nine Months Ended September 30,
	2019		2018			2019			2018
Net income (loss)	$	6,820	$	(43,522	)	$	17,655		$	13,799
Plus:
Interest expense	20,400		19,257			61,273			58,091
Interest expense - amortization of deferred financing costs	694		618			2,026			1,872
Depreciation and amortization	55,627		44,141			158,738			131,631
General and administrative expenses	6,974		5,963			25,217			22,209
Equity in loss (income) of Real Estate Ventures	1,965		(1		)	4,814			1,182
Provision for impairment	—		56,865			—			56,865

Less:
Interest income	558		1,220			1,636			2,564
Income tax provision	—		—			(46		)	(158		)
Net gain (loss) on disposition of real estate	356		—			356			(35		)
Net gain on sale of undepreciated real estate	250		—			1,501			2,859
Net gain on real estate venture transactions	2,059		—			3,594			37,263
Consolidated net operating income	$	89,257	$	82,101		$	262,682		$	243,156

Commitments and Contingencies

9 Months Ended

Sep. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

Legal Proceedings

The Company is involved from time to time in litigation on various matters, including disputes with tenants, vendors and disputes arising out of agreements to purchase or sell properties. Given the nature of the Company’s business activities, these lawsuits are considered routine to the conduct of its business. The result of any particular lawsuit cannot be predicted, because of the very nature of litigation, the litigation process and its adversarial nature, and the jury system. The Company will establish reserves for specific legal proceedings when it determines that the likelihood of an unfavorable outcome is probable and when the amount of loss is reasonably estimable. The Company does not expect that the liabilities, if any, that may ultimately result from such legal actions will have a material adverse effect on the consolidated financial position, results of operations or cash flows of the Company.

Letters-of-Credit

Under certain mortgages, including mortgages held by real estate ventures, the Company may be required to fund required leasing and capital reserve accounts for the benefit of the mortgage lenders with a letter-of-credit. There were no associated letters-of-credit for a mortgage lender on September 30, 2019. Certain of the tenant rents at properties that secure these mortgage loans are deposited into the loan servicer’s depository accounts, which are used to fund debt service, operating expenses, capital expenditures and the escrow and reserve accounts, as necessary. Any excess cash is included in cash and cash equivalents.

Environmental

As an owner of real estate, the Company is subject to various environmental laws of federal, state, and local governments. The Company’s compliance with existing laws has not had a material adverse effect on its financial condition and results of operations, and the Company does not believe it will have a material adverse effect in the future. However, the Company cannot predict the impact of unforeseen environmental contingencies or new or changed laws or regulations on its current Properties or on properties that the Company may acquire.

Ground Rent

Lease payments by the Company under the terms of all non-cancelable ground leases of land on which properties in the Company’s consolidated portfolio are situated are expensed on a straight-line basis regardless of when payments are due. The Company’s ground leases, excluding prepaid ground leases, have remaining lease terms ranging from 9 to 65 years. Lease payments on non-cancelable leases at September 30, 2019, which, where applicable, considered CPI index rates upon adoption of Topic 842, are as follows (in thousands):



Year	Minimum Rent
2019 (three months remaining)	$	303
2020	1,217
2021	1,232
2022	1,248
2023	1,263
Thereafter	111,757
Total lease payments	$	117,020
Less: Imputed interest	(94,517		)
Present value of operating lease liabilities	$	22,503

Lease payments on non-cancelable leases at December 31, 2018, which were determined under ASC 840 and are therefore not adjusted for increases based on CPI, are as follows (in thousands):



Year	Minimum Rent
2019	$	1,222
2020	1,222
2021	1,222
2022	1,222
2023	1,222
Thereafter	55,689
Total	$	61,799

The Company obtained ground tenancy rights related to three properties in Philadelphia, Pennsylvania, which provide for contingent rent participation by the lessor in certain capital transactions and net operating cash flows of the properties after certain returns are achieved by the Company. Such amounts, if any, will be reflected as contingent rent when incurred. The leases also provide for payment by the Company of certain operating costs relating to the land, primarily real estate taxes. The above schedule of lease payments does not include any contingent rent amounts or any reimbursed expenses.

Fair Value of Contingent Consideration

On April 2, 2015, the Company purchased 618 Market Street in Philadelphia, Pennsylvania. The allocated purchase price included contingent consideration of $2.0 million payable to the seller upon commencement of development. The liability was initially recorded at fair value of $1.6 million and will accrete through interest expense to $2.0 million over the expected period until development is commenced. The fair value of this contingent consideration was determined using a probability weighted discounted

cash flow model. The significant inputs to the discounted cash flow model were the discount rate and weighted probability scenarios. As the inputs are unobservable, the Company determined the inputs used to value this liability fall within Level 3 for fair value reporting. As of September 30, 2019, the liability had accreted to $2.0 million. As there were no significant changes to the inputs, the liability remains within Level 3 for fair value reporting.

Debt Guarantees

As of September 30, 2019, the Company’s unconsolidated real estate ventures had aggregate indebtedness of $592.4 million. These loans are generally mortgage or construction loans, most of which are nonrecourse to the Company, except for customary recourse carve-outs. As of September 30, 2019, the loans for which the Company has provided recourse guarantees consist of the following: (i) a $0.3 million payment guarantee on a loan with a $3.7 million outstanding principal balance, provided to PJP VII; and (ii) up to a $41.3 million payment guarantee on a $150.0 million loan provided to 4040 Wilson. In addition, during construction undertaken by real estate ventures, including 4040 Wilson, the Company has provided and expects to continue to provide cost overrun and completion guarantees, with rights of contribution among partners or members in the real estate ventures, as well as customary environmental indemnities and guarantees of customary exceptions to nonrecourse provisions in loan agreements.

Allowance for Doubtful Accounts

As discussed in Note 2, “Basis of Presentation,” the Company, as lessor, initially analyzes each of its operating leases at the individual level to determine whether it is probable that the associated lease payments are collectible. If collectability for an individual lease is not considered probable, the Company recognizes lease revenue for that individual lease on a cash basis. For the remaining portfolio of operating leases that are individually considered collectible, the Company estimates that a portion ultimately will be uncollectible and, as such, have established and maintain a general allowance. As of September 30, 2019, the general allowance for the remaining portfolio of operating leases that are individually considered collectible was $11.3 million.

Other Commitments or Contingencies

On October 13, 2017, the Company acquired a leasehold interest in the office building known as The Bulletin Building, in Philadelphia, Pennsylvania. In connection with the acquisition, the Company is required to spend no less than $8.0 million in capital improvements to the property. As of September 30, 2019, $5.1 million of the funding related to this requirement had been met. The Company estimates that it will incur $39.0 million in excess of this funding requirement and expects to complete the redevelopment of The Bulletin Building during the second quarter of 2020 at an estimated aggregate cost of $84.8 million, inclusive of the acquisition cost of $37.8 million.

During the fourth quarter of 2017, in connection with the Schuylkill Yards Project with Drexel University, the Company entered into a neighborhood engagement program and, as of September 30, 2019, had $8.5 million of future contractual obligations. In addition, the Company estimates $2.9 million of potential additional contributions for which the Company is not currently contractually obligated.

The Company invests in its properties and regularly incurs capital expenditures in the ordinary course of business to maintain the properties. The Company believes that such expenditures enhance its competitiveness. The Company also enters into construction, utility and service contracts in the ordinary course of business which may extend beyond one year. These contracts typically provide for cancellation with insignificant or no cancellation penalties.

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On October 10, 2019, the Company issued $100.0 million of 4.100% guaranteed notes due 2024 at a price of 106.315% of their principal amount, plus accrued and unpaid interest from and including October 1, 2019, with a re-offer yield of 2.669% and $100.0 million of 4.550% guaranteed notes due 2029 at a price of 110.058% of their principal amount, plus accrued and unpaid interest from and including October 1, 2019, with a re-offer yield of 3.331% for a combined net proceeds of approximately $214.3 million after deducting underwriting discounts and estimated transaction expenses. The Company used approximately $145.5 million of the net proceeds to repay the full outstanding amount on the unsecured credit facility.

Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

Revision of Previously Issued Financial Statements

The following tables and paragraphs present line items of the previously issued financial statements that have been corrected as a result of the revision:

Balance sheet impacts (in thousands):



	December 31, 2018
Balance Sheet:	As previously reported		Adjustments		As adjusted
Assets (Parent Company and Operating Partnership)
Operating properties	3,953,319		(1,600	)	3,951,719
Accumulated depreciation	(865,462	)	(19,945	)	(885,407	)
Operating real estate investments, net	3,087,857		(21,545	)	3,066,312
Total assets	4,098,521		(21,545	)	4,076,976

Equity (Parent Company)
Additional Paid-in Capital	3,200,850		(538	)	3,200,312
Cumulative Earnings	796,513		(20,888	)	775,625
Total Brandywine Realty Trust's equity	1,820,253		(21,426	)	1,798,827
Noncontrolling interests	12,320		(119	)	12,201
Total beneficiaries' equity	1,832,573		(21,545	)	1,811,028
Total liabilities and beneficiaries' equity	4,098,521		(21,545	)	4,076,976

Equity (Operating Partnership)
General Partnership Capital	1,813,136		(21,545	)	1,791,591
Total Brandywine Operating Partnership, L.P.'s equity	1,817,861		(21,545	)	1,796,316
Total partners' equity	1,820,053		(21,545	)	1,798,508
Total liabilities and partners' equity	4,098,521		(21,545	)	4,076,976

Statement of Beneficiaries’ / Partners’ Equity impacts (in thousands):



	Three and Nine Months Ended September 30, 2018
Brandywine Realty Trust	As previously reported	Adjustments		As adjusted
Statement of Beneficiaries' Equity:
Additional paid-in capital, beginning of period	3,218,564	(487	)	3,218,077
Cumulative earnings, beginning of period	660,174	(19,081	)	641,093
Noncontrolling interest, beginning of period	17,420	(162	)	17,258
Additional paid-in capital, March 31, 2018	3,222,047	(487	)	3,221,560
Cumulative earnings, March 31, 2018	704,506	(19,340	)	685,166
Noncontrolling interests, March 31, 2018	17,538	(163	)	17,375
Additional paid-in capital, June 30, 2018	3,223,072	(487	)	3,222,585
Cumulative earnings, June 30, 2018	717,515	(19,599	)	697,916
Noncontrolling interests, June 30, 2018	17,410	(164	)	17,246
Additional paid-in capital, September 30, 2018	3,223,817	(499	)	3,223,318
Cumulative earnings, September 30, 2018	674,599	(19,855	)	654,744
Noncontrolling interests, September 30, 2018	16,824	(155	)	16,669

Brandywine Operating Partnership
Statement of Partners' Equity:
Partner Capital, beginning of period	1,815,411	(19,727	)	1,795,684
Partner Capital, March 31, 2018	1,834,947	(19,987	)	1,814,960
Partner Capital, June 30, 2018	1,814,870	(20,247	)	1,794,623
Partner Capital, September 30, 2018	1,741,379	(20,509	)	1,720,870

Statement of Operations impacts:

There were no impacts to cash flows from operating activities in any period.

Adoptions of New Accounting Guidance

Adoption of New Accounting Guidance


•	An entity need not reassess whether any expired or existing contracts are or contain leases;


•	An entity need not reassess the lease classification for any expired or existing leases; and


•	An entity need not reassess initial indirect costs for any existing leases.

Lessor Accounting

Lessor accounting

Lease payments on non-cancellable leases at September 30, 2019 are as follows (in thousands):



Year	Minimum Rent
2019 (three months remaining)	$	97,250
2020	386,991
2021	364,435
2022	324,296
2023	296,890
Thereafter	1,413,756
Total	$	2,883,618

Lease payments on non-cancellable leases at December 31, 2018 are as follows (in thousands):



Year	Minimum Rent
2019	$	392,058
2020	372,619
2021	349,160
2022	304,445
2023	277,388
Thereafter	1,265,810
Total	$	2,961,480

The table below sets forth the allocation of lease revenue recognized between fixed contractual payments and variable lease payments (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
Lease Revenue	2019		2019
Fixed contractual payments	$	110,535	$	327,252
Variable lease payments	28,693		87,861
Total	$	139,228	$	415,113

Lessee Accounting

2019. Additional rent payments for amounts in excess of this estimated growth rate will be expensed on a cash basis as incurred and are considered variable lease costs.

The table below summarizes the Company’s operating lease cost (in thousands) recognized through “Property operating expenses” on the consolidated statements of operations:



	Three Months Ended September 30,			Nine Months Ended September 30,
Lease Cost	2019			2019
Fixed lease cost	$	525		$	1,575
Variable lease cost	13			41
Total	$	538		$	1,616

Weighted-average remaining lease term (years)	52.9
Weighted-average discount rate	6.3		%

Recent Accounting Pronouncements

Organization of the Parent Company and The Operating Partnership (Tables)

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Core Portfolio of Operating Properties and Excludes Development, Redevelopment and Held for Sale

The Company’s core portfolio of operating properties excludes development properties, redevelopment properties, and properties held for sale (the “Core Properties”). The Properties were comprised of the following as of September 30, 2019:



	Number of Properties	Rentable Square Feet
Office properties	87	15,509,004
Mixed-use properties	3	641,741
Retail property	1	17,884
Core Properties	91	16,168,629
Development property	1	204,108
Redevelopment properties	3	338,650
The Properties	95	16,711,387

Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Schedule of Revision of Previously Issued Financial Statements

The following tables and paragraphs present line items of the previously issued financial statements that have been corrected as a result of the revision:

Balance sheet impacts (in thousands):



	December 31, 2018
Balance Sheet:	As previously reported		Adjustments		As adjusted
Assets (Parent Company and Operating Partnership)
Operating properties	3,953,319		(1,600	)	3,951,719
Accumulated depreciation	(865,462	)	(19,945	)	(885,407	)
Operating real estate investments, net	3,087,857		(21,545	)	3,066,312
Total assets	4,098,521		(21,545	)	4,076,976

Equity (Parent Company)
Additional Paid-in Capital	3,200,850		(538	)	3,200,312
Cumulative Earnings	796,513		(20,888	)	775,625
Total Brandywine Realty Trust's equity	1,820,253		(21,426	)	1,798,827
Noncontrolling interests	12,320		(119	)	12,201
Total beneficiaries' equity	1,832,573		(21,545	)	1,811,028
Total liabilities and beneficiaries' equity	4,098,521		(21,545	)	4,076,976

Equity (Operating Partnership)
General Partnership Capital	1,813,136		(21,545	)	1,791,591
Total Brandywine Operating Partnership, L.P.'s equity	1,817,861		(21,545	)	1,796,316
Total partners' equity	1,820,053		(21,545	)	1,798,508
Total liabilities and partners' equity	4,098,521		(21,545	)	4,076,976

Statement of Beneficiaries’ / Partners’ Equity impacts (in thousands):



	Three and Nine Months Ended September 30, 2018
Brandywine Realty Trust	As previously reported	Adjustments		As adjusted
Statement of Beneficiaries' Equity:
Additional paid-in capital, beginning of period	3,218,564	(487	)	3,218,077
Cumulative earnings, beginning of period	660,174	(19,081	)	641,093
Noncontrolling interest, beginning of period	17,420	(162	)	17,258
Additional paid-in capital, March 31, 2018	3,222,047	(487	)	3,221,560
Cumulative earnings, March 31, 2018	704,506	(19,340	)	685,166
Noncontrolling interests, March 31, 2018	17,538	(163	)	17,375
Additional paid-in capital, June 30, 2018	3,223,072	(487	)	3,222,585
Cumulative earnings, June 30, 2018	717,515	(19,599	)	697,916
Noncontrolling interests, June 30, 2018	17,410	(164	)	17,246
Additional paid-in capital, September 30, 2018	3,223,817	(499	)	3,223,318
Cumulative earnings, September 30, 2018	674,599	(19,855	)	654,744
Noncontrolling interests, September 30, 2018	16,824	(155	)	16,669

Brandywine Operating Partnership
Statement of Partners' Equity:
Partner Capital, beginning of period	1,815,411	(19,727	)	1,795,684
Partner Capital, March 31, 2018	1,834,947	(19,987	)	1,814,960
Partner Capital, June 30, 2018	1,814,870	(20,247	)	1,794,623
Partner Capital, September 30, 2018	1,741,379	(20,509	)	1,720,870

Schedule Of Lease Payments on Non-Cancellable Leases

Lease payments on non-cancellable leases at September 30, 2019 are as follows (in thousands):



Year	Minimum Rent
2019 (three months remaining)	$	97,250
2020	386,991
2021	364,435
2022	324,296
2023	296,890
Thereafter	1,413,756
Total	$	2,883,618

Lease payments on non-cancellable leases at December 31, 2018 are as follows (in thousands):



Year	Minimum Rent
2019	$	392,058
2020	372,619
2021	349,160
2022	304,445
2023	277,388
Thereafter	1,265,810
Total	$	2,961,480

Schedule Of Allocation Of Lease Revenue Recognized Between Fixed Contractual Payments And Variable Lease Payments

The table below sets forth the allocation of lease revenue recognized between fixed contractual payments and variable lease payments (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
Lease Revenue	2019		2019
Fixed contractual payments	$	110,535	$	327,252
Variable lease payments	28,693		87,861
Total	$	139,228	$	415,113

Summary of Operating Lease Cost Recognized Through Property Operating Expenses

The table below summarizes the Company’s operating lease cost (in thousands) recognized through “Property operating expenses” on the consolidated statements of operations:



	Three Months Ended September 30,			Nine Months Ended September 30,
Lease Cost	2019			2019
Fixed lease cost	$	525		$	1,575
Variable lease cost	13			41
Total	$	538		$	1,616

Weighted-average remaining lease term (years)	52.9
Weighted-average discount rate	6.3		%

Real Estate Investments (Tables)

9 Months Ended

Sep. 30, 2019

Real Estate [Abstract]

Gross Carrying Value of Operating Properties

As of September 30, 2019 and December 31, 2018, the gross carrying value of the operating properties was as follows (in thousands):



	September 30, 2019		December 31, 2018
Land	$	489,744	$	487,301
Building and improvements	3,049,606		3,048,889
Tenant improvements	455,878		415,529
Total	$	3,995,228	$	3,951,719

Summary of Gain on Sale for Each Land Parcel

The Company sold the following land parcel and recognized a gain on a property sold in a prior year during the nine months ended September 30, 2019 (dollars in thousands):



Disposition Date	Property/Portfolio Name	Location	Number of Parcels	Acres	Sales Price		Net Proceeds on Sale		Gain on Sale
March 15, 2019	9 Presidential Boulevard	Bala Cynwyd, PA	1	2.7	$	5,325	$	5,023	$	751
January 8, 2015	Libertyview	Cherry Hill, NJ	—	—	—		—		750		(a)
Total Dispositions			1	2.7	$	5,325	$	5,023	$	1,501

(a)

As of January 2019, the Company expects to receive an additional $1.0 million of contingent consideration. The Company will recognize this consideration on a cash basis due to uncertainty of collectability. The $1.0 million consideration is payable to the Company in twelve equal installments, of which $0.8 million has been received during the nine months ended September 30, 2019.

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=109226691&loc=SL51724579-110230

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1474-107760

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5D
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721677-107760

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

Investment in Unconsolidated Real Estate Ventures (Tables)

9 Months Ended

Sep. 30, 2019

Equity Method Investments and Joint Ventures [Abstract]

Investment in Real Estate Ventures and Share of Real Estate Ventures' Income (Loss)

The following is a summary of the financial position of the Real Estate Ventures in which the Company held interests as of September 30, 2019 and December 31, 2018 (in thousands):



	September 30, 2019		December 31, 2018
Net property	$	841,743	$	835,983
Other assets (a)	351,364		159,499
Other liabilities (a)	289,952		85,681
Debt, net (b)	581,024		365,707
Equity (c)	322,131		544,094


(a)	The increase is due to the recording of lease related assets and liabilities of $197.1 million and $206.4 million, respectively, for MAP Venture in connection with the adoption of Topic 842.


(b)	The increase is due to third-party debt financing received by Herndon Innovation Center Venture during the three months ended March 31, 2019. See “Herndon Innovation Center Metro Portfolio Venture” section below for further information.

(c)



	Three Months Ended September 30, 2019
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			MAP Venture			Other			Total
Revenue	$	—		$	1,360		$	17,476		$	13,890		$	32,726
Operating expenses	—			(871		)	(11,981		)	(5,017		)	(17,869		)
Interest expense, net	—			(222		)	(2,436		)	(3,522		)	(6,180		)
Depreciation and amortization	—			(540		)	(6,247		)	(6,307		)	(13,094		)
Gain on early extinguishment of debt	$	—		$	4,371		$	—		$	—		$	4,371
Net income (loss)	$	—		$	4,098		$	(3,188	)	$	(956	)	$	(46	)
Ownership interest %	—		%	50		%	50		%	(b)			(b)
Company's share of net income (loss)	$	—		$	2,049		$	(1,594	)	$	(2,400	)	$	(1,945	)
Basis adjustments and other	—			31			(28		)	(23		)	(20		)
Equity in income (loss) of Real Estate Ventures	$	—		$	2,080		$	(1,622	)	$	(2,423	)	$	(1,965	)



	Three Months Ended September 30, 2018
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			MAP Venture			Other			Total
Revenue	$	14,232		$	5,962		$	17,243		$	4,580		$	42,017
Operating expenses	(6,428		)	(2,589		)	(10,219		)	(1,904		)	(21,140		)
Interest expense, net	(2,549		)	(873		)	(2,894		)	(1,228		)	(7,544		)
Depreciation and amortization	(4,896		)	(2,232		)	(4,654		)	(1,481		)	(13,263		)
Loss on early extinguishment of debt	—			—			(334		)	—			(334		)
Net income (loss)	$	359		$	268		$	(858	)	$	(33	)	$	(264	)
Ownership interest %	50		%	50		%	50		%	(b)			(b)
Company's share of net income (loss)	$	180		$	134		$	(429	)	$	(121	)	$	(236	)
Basis adjustments and other	243			31			(15		)	(22		)	237
Equity in income (loss) of Real Estate Ventures	$	423		$	165		$	(444	)	$	144		$	1



	Nine months ended September 30, 2019
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			evo at Cira Centre South (c)			MAP Venture			Other			Total
Revenue	$	—		$	5,050		$	—		$	53,560		$	42,538		$	101,148
Operating expenses	—			(2,473		)	—			(35,747		)	(15,736		)	(53,956		)
Interest expense, net	—			(698		)	—			(7,504		)	(8,219		)	(16,421		)
Depreciation and amortization	—			(2,055		)	—			(19,146		)	(19,078		)	(40,279		)
Loss on early extinguishment of debt	$	—		$	4,371		$	—		$	—		$	—		$	4,371
Net income (loss)	$	—		$	4,195		$	—		$	(8,837	)	$	(495	)	$	(5,137	)
Ownership interest %	—		%	50		%	—		%	50		%	(b)			(b)
Company's share of net income (loss)	$	—		$	2,098		$	—		$	(4,419	)	$	(2,444	)	$	(4,765	)
Basis adjustments and other	—			101			—			(69		)	(81		)	(49		)
Equity in income (loss) of Real Estate Ventures	$	—		$	2,199		$	—		$	(4,488	)	$	(2,525	)	$	(4,814	)



	Nine Months Ended September 30, 2018
	DRA (G&I) Austin (a)			Brandywine-AI Venture LLC			evo at Cira Centre South (c)			MAP Venture			Other			Total
Revenue	$	42,492		$	17,768		$	995		$	50,976		$	13,708		$	125,939
Operating expenses	(18,245		)	(8,010		)	(250		)	(30,347		)	(5,145		)	(61,997		)
Interest expense, net	(7,070		)	(2,606		)	(388		)	(10,426		)	(3,132		)	(23,622		)
Depreciation and amortization	(15,622		)	(6,915		)	(376		)	(14,096		)	(4,430		)	(41,439		)
Loss on early extinguishment of debt	—			—			(718		)	(334		)	—			(1,052		)
Net income (loss)	$	1,555		$	237		$	(737	)	$	(4,227	)	$	1,001		$	(2,171	)
Ownership interest %	50		%	50		%	50		%	50		%	(b)			(b)
Company's share of net income (loss)	$	778		$	119		$	(369	)	$	(2,114	)	$	168		$	(1,418	)
Basis adjustments and other	378			33			11			(39		)	(147		)	236
Equity in income (loss) of Real Estate Ventures	$	1,156		$	152		$	(358	)	$	(2,153	)	$	21		$	(1,182	)


(a)	On December 11, 2018, the Company acquired from DRA Advisors, an unaffiliated third party, DRA’s 50% ownership interest in the G&I Austin Office LLC real estate venture. The DRA Austin Venture owned twelve office properties containing an aggregate 1,570,123 square feet, located in Austin, Texas. As a result of the acquisition, the Company acquired complete ownership of the Austin properties.


(b)	The Company’s unconsolidated ownership interests ranged from 15% to 70% during the three and nine months ended September 30, 2019 and 25% to 70% during the three and nine months ended September 30, 2018, subject to specified priority allocations of distributable cash in certain of the Real Estate Ventures.


(c)	The Company sold its 50% ownership interest in evo at Cira Centre South Venture during the first quarter of 2018.

Intangible Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets and Liabilities

As of September 30, 2019 and December 31, 2018, the Company’s intangible assets/liabilities were comprised of the following (in thousands):



	September 30, 2019
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	168,881	$	(74,951	)	$	93,930
Tenant relationship value	5,268		(4,728		)	540
Above market leases acquired	4,955		(3,627		)	1,328
Total intangible assets, net	$	179,104	$	(83,306	)	$	95,798

	Total Cost		Accumulated Amortization			Intangible Liabilities, net
Acquired lease intangibles, net:
Below market leases acquired	$	44,876	$	(20,826	)	$	24,050



	December 31, 2018
	Total Cost		Accumulated Amortization			Intangible Assets, net
Intangible assets, net:
In-place lease value	$	181,887	$	(53,376	)	$	128,511
Tenant relationship value	9,564		(8,551		)	1,013
Above market leases acquired	4,966		(3,142		)	1,824
Total intangible assets, net	$	196,417	$	(65,069	)	$	131,348

	Total Cost		Accumulated Amortization			Intangible Liabilities, net
Acquired lease intangibles, net:
Below market leases acquired	$	49,655	$	(17,872	)	$	31,783

Summary of Amortization for Intangible Assets and Liabilities

As of September 30, 2019, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands):



	Assets		Liabilities
2019 (three months remaining)	$	10,057	$	1,696
2020	28,185		5,299
2021	18,289		3,890
2022	12,153		2,270
2023	9,236		1,722
Thereafter	17,878		9,173
Total	$	95,798	$	24,050

Debt Obligations (Tables)

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Consolidated debt obligations

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at September 30, 2019 and December 31, 2018 (in thousands):



	September 30, 2019			December 31, 2018			Effective Interest Rate	Maturity Date
MORTGAGE DEBT:
Two Logan Square	$	81,535		$	82,805		3.98%	May 2020
Four Tower Bridge	9,351			9,526			4.50%	February 2021
One Commerce Square	117,486			120,183			3.64%	April 2023
Two Commerce Square	108,991			110,518			4.51%	April 2023
Principal balance outstanding	317,363			323,032
Plus: fair market value premium (discount), net	(1,477		)	(1,759		)
Less: deferred financing costs	(283		)	(404		)
Mortgage indebtedness	$	315,603		$	320,869

UNSECURED DEBT
$600 million Unsecured Credit Facility	$	146,500		$	92,500		LIBOR + 1.10%	July 2022
Seven-Year Term Loan - Swapped to fixed	250,000			250,000			2.87%	October 2022
$350.0M 3.95% Guaranteed Notes due 2023	350,000			350,000			3.87%	February 2023
$250.0M 4.10% Guaranteed Notes due 2024	250,000			250,000			4.33%	October 2024
$450.0M 3.95% Guaranteed Notes due 2027	450,000			450,000			4.03%	November 2027
$250.0M 4.55% Guaranteed Notes due 2029	250,000			250,000			4.60%	October 2029
Indenture IA (Preferred Trust I)	27,062			27,062			LIBOR + 1.25%	March 2035
Indenture IB (Preferred Trust I) - Swapped to fixed	25,774			25,774			3.30%	April 2035
Indenture II (Preferred Trust II) - Swapped to fixed	25,774			25,774			3.09%	July 2035
Principal balance outstanding	1,775,110			1,721,110
Plus: original issue premium (discount), net	(3,852		)	(4,096		)
Less: deferred financing costs	(8,606		)	(9,837		)
Total unsecured indebtedness	$	1,762,652		$	1,707,177
Total Debt Obligations	$	2,078,255		$	2,028,046

Schedule of maturities of long-term debt

As of September 30, 2019, the Company’s aggregate scheduled principal payments of debt obligations are as follows (in thousands):



2019 (three months remaining)	$	1,926
2020	87,225
2021	15,143
2022	402,832
2023	556,737
Thereafter	1,028,610
Total principal payments	2,092,473
Net unamortized premiums/(discounts)	(5,329		)
Net deferred financing costs	(8,889		)
Outstanding indebtedness	$	2,078,255

Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments With Fair Values Different From Their Carrying Amount

The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands):



	September 30, 2019				December 31, 2018
	Carrying Amount (a)		Fair Value		Carrying Amount (a)		Fair Value
Unsecured notes payable	$	1,289,112	$	1,366,900	$	1,288,024	$	1,262,570
Variable rate debt	$	473,540	$	456,478	$	419,153	$	402,924
Mortgage notes payable	$	315,603	$	320,761	$	320,869	$	318,515
Notes receivable	$	44,430	$	40,844	$	47,771	$	47,747


(a)	Amounts presented are net of deferred financing costs of $7.0 million and $7.9 million for unsecured notes payable, $1.6 million and $5.1 million for variable rate debt and $0.3 million and $0.4 million for mortgage notes payable as of September 30, 2019 and December 31, 2018, respectively.

Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value



Hedge Product	Hedge Type	Designation		Notional Amount				Strike		Trade Date	Maturity Date	Fair value
				9/30/2019		12/31/2018						9/30/2019			12/31/2018
Assets
Swap	Interest Rate	Cash Flow	(a)	$	25,774	$	25,774	3.090	%	January 6, 2012	October 30, 2019	$	28		$	183

Liabilities
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000	2.868	%	October 8, 2015	October 8, 2022	$	(1,586	)	$	7,008
Swap	Interest Rate	Cash Flow	(a)	$	25,774	$	25,774	3.300	%	December 22, 2011	January 30, 2021	(99		)	292
				$	301,548	$	301,548

(a)

Hedging unsecured variable rate debt.

Beneficiaries Equity of the Parent Company (Tables)

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Earnings Per Share (EPS), Basic and Diluted



	Three Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income (loss)	$	6,820		$	6,820		$	(43,522	)	$	(43,522	)
Net (income) loss attributable to noncontrolling interests	(48		)	(48		)	342			342
Nonforfeitable dividends allocated to unvested restricted shareholders	(93		)	(93		)	(80		)	(80		)
Net income (loss) attributable to common shareholders	$	6,679		$	6,679		$	(43,260	)	$	(43,260	)
Denominator
Weighted-average shares outstanding	176,195,244			176,195,244			178,602,622			178,602,622
Contingent securities/Share based compensation	—			555,356			—			—
Weighted-average shares outstanding	176,195,244			176,750,600			178,602,622			178,602,622
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	0.04		$	0.04		$	(0.24	)	$	(0.24	)



	Nine Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income	$	17,655		$	17,655		$	13,799		$	13,799
Net income attributable to noncontrolling interests	(155		)	(155		)	(162		)	(162		)
Nonforfeitable dividends allocated to unvested restricted shareholders	(305		)	(305		)	(280		)	(280		)
Net income attributable to common shareholders	$	17,195		$	17,195		$	13,357		$	13,357
Denominator
Weighted-average shares outstanding	176,066,507			176,066,507			178,515,993			178,515,993
Contingent securities/Share based compensation	—			551,219			—			1,236,551
Weighted-average shares outstanding	176,066,507			176,617,726			178,515,993			179,752,544
Earnings per Common Share:
Net income attributable to common shareholders	$	0.10		$	0.10		$	0.07		$	0.07

Partners Equity of the Operating Partnership (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share (EPS), Basic and Diluted



	Three Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income (loss)	$	6,820		$	6,820		$	(43,522	)	$	(43,522	)
Net (income) loss attributable to noncontrolling interests	(48		)	(48		)	342			342
Nonforfeitable dividends allocated to unvested restricted shareholders	(93		)	(93		)	(80		)	(80		)
Net income (loss) attributable to common shareholders	$	6,679		$	6,679		$	(43,260	)	$	(43,260	)
Denominator
Weighted-average shares outstanding	176,195,244			176,195,244			178,602,622			178,602,622
Contingent securities/Share based compensation	—			555,356			—			—
Weighted-average shares outstanding	176,195,244			176,750,600			178,602,622			178,602,622
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	0.04		$	0.04		$	(0.24	)	$	(0.24	)



	Nine Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income	$	17,655		$	17,655		$	13,799		$	13,799
Net income attributable to noncontrolling interests	(155		)	(155		)	(162		)	(162		)
Nonforfeitable dividends allocated to unvested restricted shareholders	(305		)	(305		)	(280		)	(280		)
Net income attributable to common shareholders	$	17,195		$	17,195		$	13,357		$	13,357
Denominator
Weighted-average shares outstanding	176,066,507			176,066,507			178,515,993			178,515,993
Contingent securities/Share based compensation	—			551,219			—			1,236,551
Weighted-average shares outstanding	176,066,507			176,617,726			178,515,993			179,752,544
Earnings per Common Share:
Net income attributable to common shareholders	$	0.10		$	0.10		$	0.07		$	0.07

BRANDYWINE OPERATING PARTNERSHIP, L.P.

Earnings Per Share (EPS), Basic and Diluted



	Three Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income (loss)	$	6,820		$	6,820		$	(43,522	)	$	(43,522	)
Net income attributable to noncontrolling interests	(11		)	(11		)	(20		)	(20		)
Nonforfeitable dividends allocated to unvested restricted unitholders	(93		)	(93		)	(80		)	(80		)
Net income (loss) attributable to common unitholders	$	6,716		$	6,716		$	(43,622	)	$	(43,622	)
Denominator
Weighted-average units outstanding	177,176,870			177,176,870			180,082,421			180,082,421
Contingent securities/Share based compensation	—			555,356			—			—
Total weighted-average units outstanding	177,176,870			177,732,226			180,082,421			180,082,421
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	0.04			0.04			(0.24		)	(0.24		)



	Nine Months Ended September 30,
	2019						2018
	Basic			Diluted			Basic			Diluted
Numerator
Net income	$	17,655		$	17,655		$	13,799		$	13,799
Net income attributable to noncontrolling interests	(58		)	(58		)	(46		)	(46		)
Nonforfeitable dividends allocated to unvested restricted unitholders	(305		)	(305		)	(280		)	(280		)
Net income attributable to common unitholders	$	17,292		$	17,292		$	13,473		$	13,473
Denominator
Weighted-average units outstanding	177,048,621			177,048,621			179,995,792			179,995,792
Contingent securities/Share based compensation	—			551,219			—			1,236,551
Total weighted-average units outstanding	177,048,621			177,599,840			179,995,792			181,232,343
Earnings per Common Partnership Unit
Net income attributable to common unitholders	$	0.10		$	0.10		$	0.07		$	0.07

Segment Information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Real Estate Investments, Net Operating Income and Unconsolidated Real Estate Ventures of Reportable Segments

The following tables provide selected asset information and results of operations of the Company's reportable segments (in thousands):



Real estate investments, at cost:
	September 30, 2019		December 31, 2018
Philadelphia CBD	$	1,716,466	$	1,670,388
Pennsylvania Suburbs	1,005,332		1,002,937
Austin, Texas	719,441		667,698
Metropolitan Washington, D.C.	467,117		524,190
Other	86,872		86,506
	$	3,995,228	$	3,951,719

Right of use asset - operating leases, net (a)	$	21,828	$	—

Corporate
Construction-in-progress	$	151,232	$	150,263
Land held for development (b)	$	92,189	$	86,401
Prepaid leasehold interests in land held for development, net (c)	$	39,694	$	39,999


(a)	On January 1, 2019, as a result of the adoption of Topic 842, Leases, the Company recognized operating ground leases for which it is a lessee on its consolidated balance sheets. See Note 2, “Basis of Presentation,” for further information.

(b)


(c)	As of September 30, 2019 and December 31, 2018, this caption comprised leasehold interests in prepaid 99-year ground leases at 3025 and 3001-3003 JFK Boulevard, in Philadelphia, Pennsylvania.

Net operating income (in thousands):



	Three Months Ended September 30,
	2019								2018
	Total revenue		Operating expenses (a)			Net operating income (loss)			Total revenue		Operating expenses (a)			Net operating income (loss)
Philadelphia CBD	$	66,105	$	(24,773	)	$	41,332		$	64,352	$	(24,427	)	$	39,925
Pennsylvania Suburbs	34,818		(11,667		)	23,151			34,745		(11,956		)	22,789
Austin, Texas (b)	26,280		(9,302		)	16,978			8,641		(3,894		)	4,747
Metropolitan Washington, D.C. (c)	13,179		(5,999		)	7,180			22,754		(8,548		)	14,206
Other	3,706		(2,691		)	1,015			3,707		(2,436		)	1,271
Corporate	1,243		(1,642		)	(399		)	799		(1,636		)	(837		)
Operating properties	$	145,331	$	(56,074	)	$	89,257		$	134,998	$	(52,897	)	$	82,101



	Nine Months Ended September 30,
	2019								2018
	Total revenue		Operating expenses (a)			Net operating income (loss)			Total revenue		Operating expenses (a)			Net operating income (loss)
Philadelphia CBD	$	196,859	$	(75,311	)	$	121,548		$	190,478	$	(73,559	)	116,919
Pennsylvania Suburbs	104,744		(36,466		)	68,278			103,960		(37,075		)	66,885
Austin, Texas (b)	77,234		(28,182		)	49,052			25,474		(10,812		)	14,662
Metropolitan Washington, D.C. (c)	40,372		(18,542		)	21,830			69,012		(25,699		)	43,313
Other	10,352		(7,226		)	3,126			13,187		(9,601		)	3,586
Corporate	3,817		(4,969		)	(1,152		)	3,031		(5,240		)	(2,209		)
Operating properties	$	433,378	$	(170,696	)	$	262,682		$	405,142	$	(161,986	)	$	243,156


(a)	Includes property operating expenses, real estate taxes and third party management expense.


(b)	On December 11, 2018, the Company acquired from DRA Advisors, an unaffiliated third party, DRA’s 50% ownership interest in the G&I Austin Office LLC real estate venture. The DRA Austin Venture owned twelve office properties containing an aggregate 1,570,123 square feet, located in Austin, Texas. As a result of the acquisition, the Company acquired complete ownership of the Austin properties.


(c)	On December 20, 2018, the Company contributed a portfolio of eight properties containing an aggregate of 1,293,197 square feet, located in its Metropolitan Washington, D.C. segment, known as the Rockpoint Portfolio, to the Herndon Innovation Center Venture. The Company and its partner own 15% and 85% interests in the Herndon Innovation Center Venture, respectively.



Unconsolidated real estate ventures (in thousands):
	Investment in real estate ventures				Equity in income (loss) of real estate venture
	As of				Three Months Ended September 30,						Nine Months Ended September 30,
	September 30, 2019		December 31, 2018		2019			2018			2019			2018
Philadelphia CBD	$	18,114	$	19,897	$	55		$	(36	)	$	217		$	(183	)
Metropolitan Washington, D.C. (a) (b)	106,111		136,142		(528		)	(31		)	(963		)	(431		)
MAP Venture (c)	1,620		11,173		(1,602		)	(444		)	(4,414		)	(2,011		)
Other	1,914		1,888		110			89			346			287
Austin, Texas (d)	—		—		—			423			—			1,156
Total	$	127,759	$	169,100	$	(1,965	)	$	1		$	(4,814	)	$	(1,182	)


(a)	On December 20, 2018, the Company formed the Herndon Innovation Center Venture. See footnote (c) to the “Net operating income” table above for further information regarding this transaction.


(b)	On August 29, 2019, BDN – AI Venture transferred an office building to the lender in full satisfaction of the outstanding mortgage loan. Refer to Note 4, “Investment in Unconsolidated Real Estate Ventures” for further information.


(c)	Represents a joint venture formed on February 4, 2016 between the Company and MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff Capital Management Group, LLC. The business operations, including properties in Richmond,

(d)

On December 11, 2018, the Company acquired from DRA Advisors, an unaffiliated third party, DRA’s 50% ownership interest in the G&I Austin Office LLC real estate venture. The DRA Austin Venture owned twelve office properties containing an aggregate 1,570,123 square feet, located in Austin, Texas. As a result of the acquisition, the Company acquired complete ownership of the Austin properties.

Reconciliation of Consolidated Net Income to Consolidated NOI

The following is a reconciliation of consolidated net income, as defined by GAAP, to consolidated NOI, (in thousands):



	Three Months Ended September 30,					Nine Months Ended September 30,
	2019		2018			2019			2018
Net income (loss)	$	6,820	$	(43,522	)	$	17,655		$	13,799
Plus:
Interest expense	20,400		19,257			61,273			58,091
Interest expense - amortization of deferred financing costs	694		618			2,026			1,872
Depreciation and amortization	55,627		44,141			158,738			131,631
General and administrative expenses	6,974		5,963			25,217			22,209
Equity in loss (income) of Real Estate Ventures	1,965		(1		)	4,814			1,182
Provision for impairment	—		56,865			—			56,865

Less:
Interest income	558		1,220			1,636			2,564
Income tax provision	—		—			(46		)	(158		)
Net gain (loss) on disposition of real estate	356		—			356			(35		)
Net gain on sale of undepreciated real estate	250		—			1,501			2,859
Net gain on real estate venture transactions	2,059		—			3,594			37,263
Consolidated net operating income	$	89,257	$	82,101		$	262,682		$	243,156

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Operating lease liabilities maturity schedule

Lease payments on non-cancelable leases at September 30, 2019, which, where applicable, considered CPI index rates upon adoption of Topic 842, are as follows (in thousands):



Year	Minimum Rent
2019 (three months remaining)	$	303
2020	1,217
2021	1,232
2022	1,248
2023	1,263
Thereafter	111,757
Total lease payments	$	117,020
Less: Imputed interest	(94,517		)
Present value of operating lease liabilities	$	22,503

Future minimum renal payments under prior guidance

Lease payments on non-cancelable leases at December 31, 2018, which were determined under ASC 840 and are therefore not adjusted for increases based on CPI, are as follows (in thousands):



Year	Minimum Rent
2019	$	1,222
2020	1,222
2021	1,222
2022	1,222
2023	1,222
Thereafter	55,689
Total	$	61,799

Organization of The Parent Company and The Operating Partnership (Textual) (Details)	9 Months Ended
	Sep. 30, 2019 a ft² parcel property
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of properties \| property	95
Net rentable area (in square feet)	16,711,387
Unconsolidated Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of properties \| property	10
Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Areas of land held for development (in acres) \| a	234.7
Area of land held for sale (in acres) \| a	35.2
Area of additional undeveloped parcels of land with option to purchase (in acres) \| a	55.5
Total potential development capacity (in square feet)	14,200,000
Parent Company \| Land Parcel One
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
Parent Company \| Land Parcel Two
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
Parent Company \| Assets Held-for-sale
Organization of The Parent Company and The Operating Partnership [Line Items]
Total potential development capacity (in square feet)	200,000
Parent Company \| Leashold Interest Land
Organization of The Parent Company and The Operating Partnership [Line Items]
Areas of land held for development (in acres) \| a	1.8
Number of parcels of land \| parcel	2
Wholly-owned Management Company Subsidiaries
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	24,600,000
Wholly-owned Management Company Subsidiaries \| Wholly Owned Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	16,700,000
Wholly-owned Management Company Subsidiaries \| Partially Owned Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Net rentable area (in square feet)	7,900,000
Brandywine Operating Partnership LP
Organization of The Parent Company and The Operating Partnership [Line Items]
Ownership in the operating partnership	99.40%

Organization of The Parent Company and The Operating Partnership - Summary of Core Portfolio of Operating Properties and Excludes Development, Redevelopment and Held for Sale (Details)	Sep. 30, 2019 ft² property
Real Estate Properties [Line Items]
Number of properties \| property	95
Net rentable area (in square feet) \| ft²	16,711,387
Office properties
Real Estate Properties [Line Items]
Number of properties \| property	87
Net rentable area (in square feet) \| ft²	15,509,004
Mixed-use properties
Real Estate Properties [Line Items]
Number of properties \| property	3
Net rentable area (in square feet) \| ft²	641,741
Retail property
Real Estate Properties [Line Items]
Number of properties \| property	1
Net rentable area (in square feet) \| ft²	17,884
Core Properties
Real Estate Properties [Line Items]
Number of properties \| property	91
Net rentable area (in square feet) \| ft²	16,168,629
Development property
Real Estate Properties [Line Items]
Number of properties \| property	1
Net rentable area (in square feet) \| ft²	204,108
Redevelopment properties
Real Estate Properties [Line Items]
Number of properties \| property	3
Net rentable area (in square feet) \| ft²	338,650

Basis of Presentation (Textual) (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 15, 2019 USD ($)	Jan. 01, 2019 USD ($)	Jan. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($) $ / shares	Sep. 30, 2019 USD ($) lease acquisition $ / shares	Sep. 30, 2018 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Mar. 15, 2017 USD ($) ft²
Basis Of Presentation [Line Items]
Number of acquisitions for which adjustments have been made to correct errors related to of purchase price allocation \| acquisition						2
Net income attributable to Brandywine Realty Trust				$ 6,772	$ (43,180)	$ 17,500	$ 13,637
Cumulative effect of accounting change		$ 5,336
Number of long-term ground leases \| lease						6
Right of use asset - operating leases		22,400		21,828		$ 21,828			$ 0
Lease liability - operating leases		$ 22,400		$ 22,503		22,503			$ 0
Proceeds from the sale of properties						$ 41,546	16,771
Philadelphia Marine Center (Marine Piers)
Basis Of Presentation [Line Items]
Rentable area (in square feet) \| ft²										181,900
Total sale price for property sold										$ 21,400
Initial cash consideration for property sold										12,000
Proceeds from the sale of properties	$ 11,200
Unrecorded gain receivable on property sold								$ 9,400		$ 9,400
Uncollectible Leases
Basis Of Presentation [Line Items]
Cumulative effect of accounting change			$ 700
Error Corrections and Prior Period Adjustments
Basis Of Presentation [Line Items]
Net income attributable to Brandywine Realty Trust					$ (300)		$ (800)
Net income per share amount (in dollars per share) \| $ / shares					$ 0	$ (0.01)

Basis of Presentation - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Building and improvements	$ 3,995,228			$ 3,951,719
Accumulated depreciation	(944,994)			(885,407)
Operating real estate investments, net	3,072,062			3,066,312
Total assets	4,020,432			4,076,976
Additional Paid-in Capital	3,189,350			3,200,312
Cumulative Earnings	787,789			775,625
Total Brandywine Realty Trust's equity	1,690,742			1,798,827
Noncontrolling interests	11,695			12,201
Total beneficiaries' equity	1,702,437	$ 1,729,665	$ 1,760,463	1,811,028	$ 1,756,294	$ 1,830,525	$ 1,847,251	$ 1,826,870
Total liabilities and beneficiaries' equity	$ 4,020,432			4,076,976
Total Brandywine Operating Partnership, L.P.'s equity				1,796,316
Total partners' equity				1,798,508
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Building and improvements				3,953,319
Accumulated depreciation				(865,462)
Operating real estate investments, net				3,087,857
Total assets				4,098,521
Additional Paid-in Capital				3,200,850
Cumulative Earnings				796,513
Total Brandywine Realty Trust's equity				1,820,253
Noncontrolling interests				12,320
Total beneficiaries' equity				1,832,573
Total liabilities and beneficiaries' equity				4,098,521
Total Brandywine Operating Partnership, L.P.'s equity				1,817,861
Total partners' equity				1,820,053
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Building and improvements				(1,600)
Accumulated depreciation				(19,945)
Operating real estate investments, net				(21,545)
Total assets				(21,545)
Additional Paid-in Capital				(538)
Cumulative Earnings				(20,888)
Total Brandywine Realty Trust's equity				(21,426)
Noncontrolling interests				(119)
Total beneficiaries' equity				(21,545)
Total liabilities and beneficiaries' equity				(21,545)
Total Brandywine Operating Partnership, L.P.'s equity				(21,545)
Total partners' equity				(21,545)
General Partner Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
General Partnership Capital				1,791,591
Total partners' equity				1,791,591
General Partner Capital \| As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
General Partnership Capital				1,813,136
Total partners' equity				1,813,136
General Partner Capital \| Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
General Partnership Capital				$ (21,545)

Basis of Presentation - Statement of Beneficiaries' Equity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity	$ 1,702,437	$ 1,729,665	$ 1,760,463	$ 1,811,028	$ 1,756,294	$ 1,830,525	$ 1,847,251	$ 1,826,870
Additional Paid-in Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity	3,189,350	3,188,239	3,186,774	3,200,312	3,223,318	3,222,585	3,221,560	3,218,077
Cumulative Earnings
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity	787,789	781,017	774,812	775,625	654,744	697,916	685,166	641,093
Noncontrolling Interests
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity	$ 11,695	$ 11,846	12,025	12,201	16,669	17,246	17,375	17,258
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity				1,832,573
As Previously Reported \| Additional Paid-in Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity			3,187,312	3,200,850	3,223,817	3,223,072	3,222,047	3,218,564
As Previously Reported \| Cumulative Earnings
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity			795,186	796,513	674,599	717,515	704,506	660,174
As Previously Reported \| Noncontrolling Interests
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity			12,142	12,320	16,824	17,410	17,538	17,420
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity				(21,545)
Adjustments \| Additional Paid-in Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity			(538)	(538)	(499)	(487)	(487)	(487)
Adjustments \| Cumulative Earnings
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity			(20,374)	(20,888)	(19,855)	(19,599)	(19,340)	(19,081)
Adjustments \| Noncontrolling Interests
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stockholders' equity			$ (117)	$ (119)	$ (155)	$ (164)	$ (163)	$ (162)

Basis of Presentation - Statement of Partners' Equity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity				$ 1,798,508
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity	$ 1,687,709	$ 1,715,445	$ 1,745,042	1,798,508	$ 1,733,055	$ 1,805,756	$ 1,824,205	$ 1,799,955
General Partner Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity				1,791,591
General Partner Capital \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity	$ 1,689,334	$ 1,715,685	1,740,552	1,791,591	1,720,870	1,794,623	1,814,960	1,795,684
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity				1,820,053
As Previously Reported \| General Partner Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity				1,813,136
As Previously Reported \| General Partner Capital \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity			1,761,580		1,741,379	1,814,870	1,834,947	1,815,411
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity				(21,545)
Adjustments \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity				$ (21,545)
Adjustments \| General Partner Capital \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Partners' equity			$ (21,028)		$ (20,509)	$ (20,247)	$ (19,987)	$ (19,727)

Basis of Presentation - Schedule of Lease Payments on Non-Cancellable Leases (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Accounting Policies [Abstract]
2019 (three months remaining)	$ 97,250
2020	386,991
2021	364,435
2022	324,296
2023	296,890
Thereafter	1,413,756
Total	$ 2,883,618

Basis of Presentation - Schedule of Lease Payments on Non-Cancellable Leases Under Topic 840 (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Accounting Policies [Abstract]
2019	$ 392,058
2020	372,619
2021	349,160
2022	304,445
2023	277,388
Thereafter	1,265,810
Total	$ 2,961,480

Basis of Presentation - Schedule of Allocation of Lease Revenue Recognized Between Fixed Contractual Payments and Variable Lease Payments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lease Revenue
Fixed contractual payments	$ 110,535		$ 327,252
Variable lease payments	28,693		87,861
Total	$ 139,228	$ 128,635	$ 415,113	$ 382,321

Basis of Presentation - Summary of Operating Lease Cost Recognized Through Property Operating Expenses (Details) - Property Operating Expenses $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lease Cost
Fixed lease cost	$ 525	$ 1,575
Variable lease cost	13	41
Total	$ 538	$ 1,616
Weighted-average remaining lease term (years)	52 years 10 months 24 days	52 years 10 months 24 days
Weighted-average discount rate	6.30%	6.30%

Real Estate Investments - Gross Carrying Value of Operating Properties (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Real Estate [Line Items]
Building and improvements	$ 3,995,228	$ 3,951,719
Total	3,995,228	3,951,719
Land
Real Estate [Line Items]
Land	489,744	487,301
Building and Building Improvements
Real Estate [Line Items]
Building and improvements	3,049,606	3,048,889
Tenant Improvements
Real Estate [Line Items]
Tenant improvements	$ 455,878	$ 415,529

Real Estate Investments - Summary of Land Parcels Sold (Details) $ in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 15, 2019 USD ($) a parcel	Jan. 08, 2015 USD ($) a parcel	Jan. 31, 2019 USD ($) installment	Sep. 30, 2019 USD ($) a	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) a parcel	Sep. 30, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from the sale of properties						$ 41,546	$ 16,771
Gain (loss) on sale				$ 250	$ 0	$ 1,501	$ 2,859
Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of parcels of land \| parcel						1
Area of land (in acres) \| a				2.7		2.7
Sales price				$ 5,325		$ 5,325
Proceeds from the sale of properties						5,023
Gain (loss) on sale						1,501
Land \| 9 Presidential Boulevard
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of parcels of land \| parcel	1
Area of land (in acres) \| a	2.7
Sales price	$ 5,325
Proceeds from the sale of properties	5,023
Gain (loss) on sale	$ 751
Land \| Libertyview
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of parcels of land \| parcel		0
Area of land (in acres) \| a		0
Sales price		$ 0
Proceeds from the sale of properties		0				$ 800
Gain (loss) on sale		$ 750
Contingent consideration to received			$ 1,000
Number of installments \| installment			12

Real Estate Investments (Textual) (Details) $ in Thousands		3 Months Ended		9 Months Ended
Real Estate Investments (Textual) (Details) $ in Thousands	Sep. 11, 2019 USD ($) ft²	Sep. 30, 2019 USD ($) a	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) a parcel	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale		$ 250	$ 0	$ 1,501	$ 2,859
Additional gain on prior disposal		700
Assets held for sale, net		7,349		7,349		$ 11,599
Assets Held-for-sale \| Land Held For Development
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net		$ 7,300		$ 7,300
Assets Held-for-sale \| Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of parcels of land \| parcel				2
Area of land (in acres) \| a		35.2		35.2
Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price		$ 5,325		$ 5,325
Gain (loss) on sale				$ 1,501
Number of parcels of land \| parcel				1
Area of land (in acres) \| a		2.7		2.7
Land \| 1900 Gallows Rd.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable area (in square feet) \| ft²	210,632
Sales price	$ 36,400
Gain (loss) on sale	$ (400)

Investment in Unconsolidated Real Estate Ventures (Textual) (Details)					3 Months Ended		9 Months Ended
	Apr. 12, 2019 USD ($)	Apr. 01, 2019 USD ($)	Mar. 29, 2019 USD ($) property	Jan. 01, 2019 USD ($)	Sep. 30, 2019 USD ($) a ft² apartment investment	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) a ft² parcel apartment investment	Sep. 30, 2018 USD ($)	Aug. 29, 2019 USD ($) ft²	Apr. 11, 2019 USD ($)	Dec. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Accounts receivable					$ 13,872,000		$ 13,872,000				$ 16,394,000
Cumulative effect of accounting change				$ (5,336,000)
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage					15.00%		15.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage					70.00%		70.00%
Real Estate Venture
Schedule of Equity Method Investments [Line Items]
Accounts receivable					$ 800,000		$ 800,000				$ 800,000
Real Estate Venture \| Management Fees
Schedule of Equity Method Investments [Line Items]
Service and other revenue					1,000,000.0	$ 1,400,000	3,200,000	$ 4,000,000.0
Real Estate Venture \| Leasing Commission Income
Schedule of Equity Method Investments [Line Items]
Service and other revenue					300,000	1,500,000	800,000	4,400,000
Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Investment in Real Estate Ventures, equity method					127,800,000		127,800,000
Gain on early extinguishment of debt					4,371,000	$ (334,000)	4,371,000	$ (1,052,000)
Real estate ventures aggregate indebtedness					$ 592,400,000		$ 592,400,000
Unconsolidated Real Estate Ventures \| Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage					15.00%	25.00%	15.00%	25.00%
Unconsolidated Real Estate Ventures \| Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage					70.00%	70.00%	70.00%	70.00%
Unconsolidated Real Estate Ventures \| Six Real Estate Ventures \| Office properties
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures \| investment					6		6
Rentable area (in square feet) \| ft²					5,600,000		5,600,000
Unconsolidated Real Estate Ventures \| Two Real Estate Ventures \| Land Held For Development
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures \| investment					2		2
Area of land (in acres) \| a					1.4		1.4
Unconsolidated Real Estate Ventures \| One Real Estate Venture \| Land Under Active Development
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures \| investment					1		1
Area of land (in acres) \| a					1.3		1.3
Unconsolidated Real Estate Ventures \| One Other Real Estate Venture \| Residential Tower
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures \| investment					1		1
Number of Property units \| apartment					321		321
Falls Church, Virginia
Schedule of Equity Method Investments [Line Items]
Rentable area (in square feet) \| ft²									180,659
Mortgage loan on real estate									$ 26,000,000.0
Gain on early extinguishment of debt					$ 2,200,000
MAP Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage					50.00%	50.00%	50.00%	50.00%
Gain on early extinguishment of debt					$ 0	$ (334,000)	$ 0	$ (334,000)
Number of lessee land parcels \| parcel							58
Lessee under ground lease term							99 years
Cumulative effect of accounting change				$ 9,200,000			$ 4,600,000
Herndon Innovation Center Metro Portfolio Venture, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage			15.00%
Herndon Innovation Center Metro Portfolio Venture, LLC \| Secured Debt
Schedule of Equity Method Investments [Line Items]
Indebtedness to third parties, refinanced amount			$ 134,100,000
Number of properties used to secure debt \| property			4
Debt instrument, initial advance		$ 111,000,000.0	$ 113,100,000
Herndon Innovation Center Metro Portfolio Venture, LLC \| Secured Debt \| Distributions from Loan 1
Schedule of Equity Method Investments [Line Items]
Debt instrument, initial advance	$ 16,700,000
Spread on variable rate							1.95%
Herndon Innovation Center Metro Portfolio Venture, LLC \| Secured Debt \| Distributions from Loan 2
Schedule of Equity Method Investments [Line Items]
Indebtedness to third parties, refinanced amount										$ 115,300,000
Debt instrument, initial advance	$ 13,800,000
Spread on variable rate							1.80%
Herndon Innovation Center Metro Portfolio Venture, LLC \| Minimum \| Secured Debt \| Distributions from Loan 1
Schedule of Equity Method Investments [Line Items]
Effective interest rate					5.45%		5.45%
Herndon Innovation Center Metro Portfolio Venture, LLC \| Maximum \| Secured Debt \| Distributions from Loan 1
Schedule of Equity Method Investments [Line Items]
Effective interest rate					6.45%		6.45%
Herndon Innovation Center Metro Portfolio Venture, LLC \| Maximum \| Secured Debt \| Distributions from Loan 2
Schedule of Equity Method Investments [Line Items]
Debt instrument, interest rate, stated percentage					6.30%		6.30%
PJP VII
Schedule of Equity Method Investments [Line Items]
Construction loan, principal amount					$ 3,700,000		$ 3,700,000
Guarantees, maximum exposure amount					300,000		300,000
4040 Wilson Venture
Schedule of Equity Method Investments [Line Items]
Indebtedness to third parties, refinanced amount					150,000,000.0		150,000,000.0
Guarantees, maximum exposure amount					$ 41,300,000		$ 41,300,000

Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Net property	$ 841,743		$ 835,983
Other assets	351,364		159,499
Other liabilities	289,952		85,681
Debt, net	581,024		365,707
Equity	322,131		544,094
Right of use asset - operating leases, net	21,828	$ 22,400	0
Lease liability - operating leases	$ 22,503	22,400	$ 0
MAP Venture
Schedule of Equity Method Investments [Line Items]
Right of use asset - operating leases, net		197,100
Lease liability - operating leases		$ 206,400

Investment in Unconsolidated Real Estate Ventures - Summary of Results of Operations of Real Estate Ventures with Interests (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) ft² property	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) ft² property	Sep. 30, 2018 USD ($)	Dec. 11, 2018 ft² property	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity in income (loss) of Real Estate Ventures	$ (1,965)	$ 1	$ (4,814)	$ (1,182)
Number of properties \| property	95		95
Net rentable area (in square feet) \| ft²	16,711,387		16,711,387
DRA (G&I) Austin
Schedule of Equity Method Investments [Line Items]
Revenue	$ 0	14,232	$ 0	42,492
Operating expenses	0	(6,428)	0	(18,245)
Interest expense, net	0	(2,549)	0	(7,070)
Depreciation and amortization	0	(4,896)	0	(15,622)
(Gain) loss on early extinguishment of debt	0	0	0	0
Net income (loss)	$ 0	$ 359	$ 0	$ 1,555
Ownership interest %	0.00%	50.00%	0.00%	50.00%	50.00%
Company's share of net income (loss)	$ 0	$ 180	$ 0	$ 778
Basis adjustments and other	0	243	0	378
Equity in income (loss) of Real Estate Ventures	0	423	0	1,156
Number of properties \| property					12
Net rentable area (in square feet) \| ft²					1,570,123
Brandywine-AI Ventures LLC
Schedule of Equity Method Investments [Line Items]
Revenue	1,360	5,962	5,050	17,768
Operating expenses	(871)	(2,589)	(2,473)	(8,010)
Interest expense, net	(222)	(873)	(698)	(2,606)
Depreciation and amortization	(540)	(2,232)	(2,055)	(6,915)
(Gain) loss on early extinguishment of debt	4,371	0	4,371	0
Net income (loss)	$ 4,098	$ 268	$ 4,195	$ 237
Ownership interest %	50.00%	50.00%	50.00%	50.00%
Company's share of net income (loss)	$ 2,049	$ 134	$ 2,098	$ 119
Basis adjustments and other	31	31	101	33
Equity in income (loss) of Real Estate Ventures	$ 2,080	$ 165	2,199	152
Evo At Cira Centre South Venture
Schedule of Equity Method Investments [Line Items]
Revenue			0	995
Operating expenses			0	(250)
Interest expense, net			0	(388)
Depreciation and amortization			0	(376)
(Gain) loss on early extinguishment of debt			0	(718)
Net income (loss)			$ 0	$ (737)
Ownership interest %	0.00%	50.00%	0.00%	50.00%		50.00%
Company's share of net income (loss)			$ 0	$ (369)
Basis adjustments and other			0	11
Equity in income (loss) of Real Estate Ventures			0	(358)
MAP Venture
Schedule of Equity Method Investments [Line Items]
Revenue	$ 17,476	$ 17,243	53,560	50,976
Operating expenses	(11,981)	(10,219)	(35,747)	(30,347)
Interest expense, net	(2,436)	(2,894)	(7,504)	(10,426)
Depreciation and amortization	(6,247)	(4,654)	(19,146)	(14,096)
(Gain) loss on early extinguishment of debt	0	(334)	0	(334)
Net income (loss)	$ (3,188)	$ (858)	$ (8,837)	$ (4,227)
Ownership interest %	50.00%	50.00%	50.00%	50.00%
Company's share of net income (loss)	$ (1,594)	$ (429)	$ (4,419)	$ (2,114)
Basis adjustments and other	(28)	(15)	(69)	(39)
Equity in income (loss) of Real Estate Ventures	(1,622)	(444)	(4,488)	(2,153)
Other
Schedule of Equity Method Investments [Line Items]
Revenue	13,890	4,580	42,538	13,708
Operating expenses	(5,017)	(1,904)	(15,736)	(5,145)
Interest expense, net	(3,522)	(1,228)	(8,219)	(3,132)
Depreciation and amortization	(6,307)	(1,481)	(19,078)	(4,430)
(Gain) loss on early extinguishment of debt	0	0	0	0
Net income (loss)	(956)	(33)	(495)	1,001
Company's share of net income (loss)	(2,400)	(121)	(2,444)	168
Basis adjustments and other	(23)	(22)	(81)	(147)
Equity in income (loss) of Real Estate Ventures	(2,423)	144	(2,525)	21
Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Revenue	32,726	42,017	101,148	125,939
Operating expenses	(17,869)	(21,140)	(53,956)	(61,997)
Interest expense, net	(6,180)	(7,544)	(16,421)	(23,622)
Depreciation and amortization	(13,094)	(13,263)	(40,279)	(41,439)
(Gain) loss on early extinguishment of debt	4,371	(334)	4,371	(1,052)
Net income (loss)	(46)	(264)	(5,137)	(2,171)
Company's share of net income (loss)	(1,945)	(236)	(4,765)	(1,418)
Basis adjustments and other	(20)	237	(49)	236
Equity in income (loss) of Real Estate Ventures	$ (1,965)	$ 1	$ (4,814)	$ (1,182)
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership interest %	15.00%		15.00%
Minimum \| Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Ownership interest %	15.00%	25.00%	15.00%	25.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership interest %	70.00%		70.00%
Maximum \| Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Ownership interest %	70.00%	70.00%	70.00%	70.00%

Intangible Assets and Liabilities - Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Intangible Assets [Line Items]
Intangible assets, total cost	$ 179,104	$ 196,417
Intangible assets, accumulated amortization	(83,306)	(65,069)
Intangible assets, net	95,798	131,348
Acquired lease intangibles, net	24,050	31,783
In-place lease value
Intangible Assets [Line Items]
Intangible assets, total cost	168,881	181,887
Intangible assets, accumulated amortization	(74,951)	(53,376)
Intangible assets, net	93,930	128,511
Tenant relationship value
Intangible Assets [Line Items]
Intangible assets, total cost	5,268	9,564
Intangible assets, accumulated amortization	(4,728)	(8,551)
Intangible assets, net	540	1,013
Above market leases acquired
Intangible Assets [Line Items]
Intangible assets, total cost	4,955	4,966
Intangible assets, accumulated amortization	(3,627)	(3,142)
Intangible assets, net	1,328	1,824
Below market leases acquired
Intangible Assets [Line Items]
Acquired lease intangibles, gross	44,876	49,655
Acquired lease intangibles, accumulated amortization	(20,826)	(17,872)
Acquired lease intangibles, net	$ 24,050	$ 31,783

Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
2019 (three months remaining)	$ 10,057
2020	28,185
2021	18,289
2022	12,153
2023	9,236
Thereafter	17,878
Intangible assets, net	95,798	$ 131,348
Liabilities
2019 (three months remaining)	1,696
2020	5,299
2021	3,890
2022	2,270
2023	1,722
Thereafter	9,173
Acquired lease intangibles, net	$ 24,050	$ 31,783

Debt Obligations - Consolidated Debt Obligations Outstanding (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Consolidated debt obligations
Plus: premiums/(discounts), net	$ (5,329)
Less: deferred financing costs	(8,889)
Outstanding indebtedness	2,078,255	$ 2,028,046
Secured Debt
Consolidated debt obligations
Long-term debt, gross	317,363	323,032
Plus: premiums/(discounts), net	(1,477)	(1,759)
Less: deferred financing costs	(283)	(404)
Total mortgage indebtedness	315,603	320,869
Unsecured Debt
Consolidated debt obligations
Long-term debt, gross	1,775,110	1,721,110
Plus: premiums/(discounts), net	(3,852)	(4,096)
Less: deferred financing costs	(8,606)	(9,837)
Total unsecured indebtedness	1,762,652	1,707,177
Unsecured Debt \| $600 million Unsecured Credit Facility
Consolidated debt obligations
Long-term debt, gross	146,500	92,500
Unsecured Debt \| Seven-Year Term Loan - Swapped to fixed
Consolidated debt obligations
Long-term debt, gross	$ 250,000	250,000
Effective interest rate	2.87%
Unsecured Debt \| $350.0M 3.95% Guaranteed Notes due 2023
Consolidated debt obligations
Long-term debt, gross	$ 350,000	350,000
Effective interest rate	3.87%
Unsecured Debt \| $250.0M 4.10% Guaranteed Notes due 2024
Consolidated debt obligations
Long-term debt, gross	$ 250,000	250,000
Effective interest rate	4.33%
Unsecured Debt \| $450.0M 3.95% Guaranteed Notes due 2027
Consolidated debt obligations
Long-term debt, gross	$ 450,000	450,000
Effective interest rate	4.03%
Unsecured Debt \| $250.0M 4.55% Guaranteed Notes due 2029
Consolidated debt obligations
Long-term debt, gross	$ 250,000	250,000
Effective interest rate	4.60%
Unsecured Debt \| Indenture IA (Preferred Trust I)
Consolidated debt obligations
Long-term debt, gross	$ 27,062	27,062
Unsecured Debt \| Indenture IB (Preferred Trust I) - Swapped to fixed
Consolidated debt obligations
Long-term debt, gross	$ 25,774	25,774
Effective interest rate	3.30%
Unsecured Debt \| Indenture II (Preferred Trust II) - Swapped to fixed
Consolidated debt obligations
Long-term debt, gross	$ 25,774	25,774
Effective interest rate	3.09%
LIBOR \| Unsecured Debt \| $600 million Unsecured Credit Facility
Consolidated debt obligations
Spread on variable rate	1.10%
LIBOR \| Unsecured Debt \| Indenture IA (Preferred Trust I)
Consolidated debt obligations
Spread on variable rate	1.25%
Two Logan Square \| Secured Debt
Consolidated debt obligations
Long-term debt, gross	$ 81,535	82,805
Effective interest rate	3.98%
Four Tower Bridge \| Secured Debt
Consolidated debt obligations
Long-term debt, gross	$ 9,351	9,526
Effective interest rate	4.50%
One Commerce Square \| Secured Debt
Consolidated debt obligations
Long-term debt, gross	$ 117,486	120,183
Effective interest rate	3.64%
Two Commerce Square \| Secured Debt
Consolidated debt obligations
Long-term debt, gross	$ 108,991	$ 110,518
Effective interest rate	4.51%

Debt Obligations (Textual) (Details) - USD ($)	9 Months Ended
Debt Obligations (Textual) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	3.50%
Maximum borrowing capacity	$ 600,000,000.0
Interest expense	$ 4,200,000
Effective interest rate on credit facility	3.20%
LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Spread on variable rate	1.10%
Secured Debt
Debt Instrument [Line Items]
Weighted average interest rate	4.05%	4.05%

Debt Obligations - Aggregate Scheduled Principal Payments of Debt Obligation, Excluding Amortization of Discounts and Premiums (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2019 (three months remaining)	$ 1,926
2020	87,225
2021	15,143
2022	402,832
2023	556,737
Thereafter	1,028,610
Total principal payments	2,092,473
Net unamortized premiums/(discounts)	(5,329)
Net deferred financing costs	(8,889)
Outstanding indebtedness	$ 2,078,255	$ 2,028,046

Fair Value of Financial Instruments - Financial Instruments for which Estimates of Fair Value Differ from Carrying Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable	$ 315,603	$ 320,869
Deferred financing costs, net	8,889
Unsecured Notes Payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net	8,606	9,837
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable	44,430	47,771
Carrying Amount \| Unsecured Notes Payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured notes payable	1,289,112	1,288,024
Deferred financing costs, net	7,000	7,900
Carrying Amount \| Variable Rate Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate debt	473,540	419,153
Deferred financing costs, net	1,600	5,100
Carrying Amount \| Mortgages Notes Payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable	315,603	320,869
Deferred financing costs, net	300	400
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Note receivable, fair value	40,844	47,747
Fair Value \| Unsecured Notes Payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	1,366,900	1,262,570
Fair Value \| Variable Rate Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	456,478	402,924
Fair Value \| Mortgages Notes Payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	$ 320,761	$ 318,515

Fair Value of Financial Instruments (Textual) (Details) - Brandywine 1919 Ventures $ in Millions	Jun. 26, 2018 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loan	$ 44.4
Equity method investment, ownership percentage	50.00%
Other Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Note receivable	$ 44.4

Limited Partners' Non-Controlling Interests in the Parent Company (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Noncontrolling Interest [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 9.4	$ 10.1
Settlement value of non controlling interest in operating partnership	$ 14.9	$ 12.6

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 301,548	$ 301,548
3.090% Interest Rate Swap Maturing October 30, 2019 \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative asset, notional amount	$ 25,774	25,774
Derivative, fixed interest rate	3.09%
Derivative asset, fair value, gross asset	$ 28	183
2.868% Interest Rate Swap Maturing October 8, 2022 \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 250,000	250,000
Derivative, fixed interest rate	2.868%
Derivative asset, fair value, gross asset		7,008
Derivative liability, fair value, gross liability	$ (1,586)
3.300% Interest Rate Swap Maturing January 30, 2021 \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 25,774	25,774
Derivative, fixed interest rate	3.30%
Derivative asset, fair value, gross asset		$ 292
Derivative liability, fair value, gross liability	$ (99)

Beneficiaries Equity of the Parent Company - Number of Shares and Net Income Used to Calculate Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator
Net income	$ 6,820	$ 6,252	$ 4,583	$ (43,522)	$ 12,876	$ 44,445	$ 17,655	$ 13,799
Net income attributable to noncontrolling interests, Basic	(48)			342			(155)	(162)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(93)			(80)			(305)	(280)
Net income attributable to noncontrolling interests, Diluted	(48)			342			(155)	(162)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(93)			(80)			(305)	(280)
Net income attributable to common shareholders, Diluted	$ 6,679			$ (43,260)			$ 17,195	$ 13,357
Denominator
Basic weighted average shares outstanding (in shares)	176,195,244			178,602,622			176,066,507	178,515,993
Contingent securities/Share based compensation (in shares)	555,356			0			551,219	1,236,551
Diluted weighted average shares outstanding (in shares)	176,750,600			178,602,622			176,617,726	179,752,544
Earnings per Common Share:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.04			$ (0.24)			$ 0.10	$ 0.07
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.04			$ (0.24)			$ 0.10	$ 0.07

Beneficiaries Equity of the Parent Company (Textual) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Sep. 10, 2019	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Jan. 03, 2019
Class of Stock [Line Items]
Dividends, common stock	$ 33,800,000
Shares repurchased and retired (in shares)				1,337,169
Share price (in dollars per share)				$ 12.92
Value of stock repurchased and retired		$ 0	$ 17,281,000	$ 17,300,000
Maximum
Class of Stock [Line Items]
Share repurchase, authorized amount						$ 150,000,000.0
Dividend declared
Class of Stock [Line Items]
Dividends payable (in dollars per share)	$ 0.19
Redeemable Common Limited Partnership Units
Class of Stock [Line Items]
Redeemable common limited partnership units (in shares)				981,626	1,479,799

Partners Equity of the Operating Partnership - Number of Units and Net Income Used to Calculate Basic and Diluted Earnings Per Common Partnership Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator
Net income (loss)	$ 6,820	$ 6,252	$ 4,583	$ (43,522)	$ 12,876	$ 44,445	$ 17,655	$ 13,799
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(93)			(80)			(305)	(280)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	$ (93)			$ (80)			$ (305)	$ (280)
Denominator
Basic weighted average shares outstanding (in shares)	176,195,244			178,602,622			176,066,507	178,515,993
Contingent securities/Share based compensation (in shares)	555,356			0			551,219	1,236,551
Diluted weighted average shares outstanding (in shares)	176,750,600			178,602,622			176,617,726	179,752,544
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.04			$ (0.24)			$ 0.10	$ 0.07
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.04			$ (0.24)			$ 0.10	$ 0.07
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Numerator
Net income (loss)	$ 6,820	$ 6,252	$ 4,583	$ (43,522)	$ 12,876	$ 44,445	$ 17,655	$ 13,799
Net income attributable to noncontrolling interests	(11)			(20)			(58)	(46)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(93)			(80)			(305)	(280)
Net income attributable to common unitholders, Basic	6,716			(43,622)			17,292	13,473
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(93)			(80)			(305)	(280)
Net income attributable to common unitholders, Diluted	$ 6,716			$ (43,622)			$ 17,292	$ 13,473
Denominator
Basic weighted average shares outstanding (in shares)	177,176,870			180,082,421			177,048,621	179,995,792
Contingent securities/Share based compensation (in shares)	555,356			0			551,219	1,236,551
Diluted weighted average shares outstanding (in shares)	177,732,226			180,082,421			177,599,840	181,232,343
Earnings per Common Partnership Unit:
Net income attributable to common shareholders, Basic (USD per share)	$ 0.04			$ (0.24)			$ 0.10	$ 0.07
Net income attributable to common shareholders, Diluted (USD per share)	$ 0.04			$ (0.24)			$ 0.10	$ 0.07

Partners Equity of the Operating Partnership (Textual) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Sep. 10, 2019	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2019
Earnings Per Common Partnership Unit [Line Items]
Dividends, common stock	$ 33,800,000
Shares repurchased and retired (in shares)				1,337,169
Share price (in dollars per share)				$ 12.92
Value of stock repurchased and retired		$ 0	$ 17,281,000	$ 17,300,000
Dividend declared
Earnings Per Common Partnership Unit [Line Items]
Dividends payable (in dollars per share)	$ 0.19
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Earnings Per Common Partnership Unit [Line Items]
Dividends, common stock	$ 33,800,000
Repurchase program, number of mirror unit of operating partnership retired for each common share repurchased				1
BRANDYWINE OPERATING PARTNERSHIP, L.P. \| Dividend declared
Earnings Per Common Partnership Unit [Line Items]
Dividends payable (in dollars per share)	$ 0.19

Segment Information (Textual) (Details)	9 Months Ended
Segment Information (Textual) (Details)	Sep. 30, 2019 segment
Segment Reporting [Abstract]
Number of Reportable Segments	5

Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Operating properties	$ 3,995,228		$ 3,951,719
Right of use asset - operating leases, net	21,828	$ 22,400	0
Construction-in-progress	151,232		150,263
Land held for development	92,189		86,401
Prepaid leasehold interests in land held for development, net	39,694		39,999
Philadelphia CBD
Segment Reporting Information [Line Items]
Operating properties	1,716,466		1,670,388
Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Operating properties	1,005,332		1,002,937
Austin, Texas
Segment Reporting Information [Line Items]
Operating properties	719,441		667,698
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Operating properties	467,117		524,190
Other
Segment Reporting Information [Line Items]
Operating properties	$ 86,872		$ 86,506

Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Additional Information) (Details) - a	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Assets Held-for-sale \| Land Held For Development
Segment Reporting Information [Line Items]
Area of land (in acres)		37.9
3001-3003 and 3025 JFK Boulevard
Segment Reporting Information [Line Items]
Lease agreement term	99 years	99 years
Other \| Assets Held-for-sale
Segment Reporting Information [Line Items]
Area of land (in acres)	35.2
Other \| Assets Held-for-sale \| Land Held For Development
Segment Reporting Information [Line Items]
Area of land (in acres)	35.2	35.2
Pennsylvania Suburbs \| Assets Held-for-sale \| Land Held For Development
Segment Reporting Information [Line Items]
Area of land (in acres)		2.7

Segment Information - Net Operating Income of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 145,331	$ 134,998	$ 433,378	$ 405,142
Operating expenses	(56,074)	(52,897)	(170,696)	(161,986)
Net operating income (loss)	89,257	82,101	262,682	243,156
Operating Segments \| Philadelphia CBD
Segment Reporting Information [Line Items]
Total revenue	66,105	64,352	196,859	190,478
Operating expenses	(24,773)	(24,427)	(75,311)	(73,559)
Net operating income (loss)	41,332	39,925	121,548	116,919
Operating Segments \| Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Total revenue	34,818	34,745	104,744	103,960
Operating expenses	(11,667)	(11,956)	(36,466)	(37,075)
Net operating income (loss)	23,151	22,789	68,278	66,885
Operating Segments \| Austin, Texas
Segment Reporting Information [Line Items]
Total revenue	26,280	8,641	77,234	25,474
Operating expenses	(9,302)	(3,894)	(28,182)	(10,812)
Net operating income (loss)	16,978	4,747	49,052	14,662
Operating Segments \| Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Total revenue	13,179	22,754	40,372	69,012
Operating expenses	(5,999)	(8,548)	(18,542)	(25,699)
Net operating income (loss)	7,180	14,206	21,830	43,313
Operating Segments \| Other
Segment Reporting Information [Line Items]
Total revenue	3,706	3,707	10,352	13,187
Operating expenses	(2,691)	(2,436)	(7,226)	(9,601)
Net operating income (loss)	1,015	1,271	3,126	3,586
Corporate
Segment Reporting Information [Line Items]
Total revenue	1,243	799	3,817	3,031
Operating expenses	(1,642)	(1,636)	(4,969)	(5,240)
Net operating income (loss)	$ (399)	$ (837)	$ (1,152)	$ (2,209)

Segment Information - Net Operating Income of Company's Reportable Segments (Additional Information) (Details)	Sep. 30, 2019 ft² property	Mar. 29, 2019	Dec. 20, 2018 ft² property	Dec. 11, 2018 ft² property
Segment Reporting Information [Line Items]
Number of properties \| property	95
Net rentable area (in square feet) \| ft²	16,711,387
Herndon Innovation Center Metro Portfolio Venture, LLC
Segment Reporting Information [Line Items]
Equity method investment, ownership percentage		15.00%
Herndon Innovation Center Metro Portfolio Venture, LLC \| Metropolitan Washington, D.C. - Office
Segment Reporting Information [Line Items]
Equity method investment, ownership percentage			15.00%
Net rentable area (in square feet) \| ft²			1,293,197
Number of properties contributed to a joint venture \| property			8
Herndon Innovation Center Metro Portfolio Venture, LLC \| Metropolitan Washington, D.C. - Office \| Rockpoint
Segment Reporting Information [Line Items]
Equity method investment, ownership percentage			85.00%
DRA Austin Venture
Segment Reporting Information [Line Items]
Equity method investment, ownership percentage				50.00%
Number of properties \| property				12
Net rentable area (in square feet) \| ft²				1,570,123

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Investment in real estate ventures	$ 127,759		$ 127,759		$ 169,100
Equity in (loss) income of Real Estate Ventures	(1,965)	$ 1	(4,814)	$ (1,182)
Philadelphia CBD
Segment Reporting Information [Line Items]
Investment in real estate ventures	18,114		18,114		19,897
Equity in (loss) income of Real Estate Ventures	55	(36)	217	(183)
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Investment in real estate ventures	106,111		106,111		136,142
Equity in (loss) income of Real Estate Ventures	(528)	(31)	(963)	(431)
MAP Venture
Segment Reporting Information [Line Items]
Investment in real estate ventures	1,620		1,620		11,173
Equity in (loss) income of Real Estate Ventures	(1,602)	(444)	(4,414)	(2,011)
Other
Segment Reporting Information [Line Items]
Investment in real estate ventures	1,914		1,914		1,888
Equity in (loss) income of Real Estate Ventures	110	89	346	287
Austin, Texas
Segment Reporting Information [Line Items]
Investment in real estate ventures	0		0		$ 0
Equity in (loss) income of Real Estate Ventures	$ 0	$ 423	$ 0	$ 1,156

Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Additional Information) (Details)	Sep. 30, 2019 ft² property	Dec. 11, 2018 ft² property
Segment Reporting Information [Line Items]
Number of properties \| property	95
Net rentable area (in square feet) \| ft²	16,711,387
DRA Austin Venture
Segment Reporting Information [Line Items]
Equity method investment, ownership percentage		50.00%
Number of properties \| property		12
Net rentable area (in square feet) \| ft²		1,570,123

Segment Information - Reconciliation of Consolidated Net Income to Consolidated NOI (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting [Abstract]
Net income (loss)	$ 6,820	$ 6,252	$ 4,583	$ (43,522)	$ 12,876	$ 44,445	$ 17,655	$ 13,799
Plus:
Interest expense	20,400			19,257			61,273	58,091
Interest expense - amortization of deferred financing costs	694			618			2,026	1,872
Depreciation and amortization	55,627			44,141			158,738	131,631
General and administrative expenses	6,974			5,963			25,217	22,209
Equity in loss (income) of Real Estate Ventures	1,965			(1)			4,814	1,182
Provision for impairment	0			56,865			0	56,865
Less:
Interest income	558			1,220			1,636	2,564
Income tax provision	0			0			(46)	(158)
Net gain (loss) on disposition of real estate	356			0			356	(35)
Net gain on sale of undepreciated real estate	250			0			1,501	2,859
Net gain on real estate venture transactions	2,059			0			3,594	37,263
Consolidated net operating income	$ 89,257			$ 82,101			$ 262,682	$ 243,156

Commitments and Contingencies (Textual) (Details) - USD ($)		9 Months Ended
	Apr. 02, 2015	Sep. 30, 2019	Dec. 31, 2018	Oct. 13, 2017
Property Subject to or Available for Operating Lease [Line Items]
Loan outstanding principal balance		$ 2,078,255,000	$ 2,028,046,000
General allowance for remaining portfolio of operating leases considered collectible		11,300,000
4040 Wilson Venture
Property Subject to or Available for Operating Lease [Line Items]
Guarantees, maximum exposure amount		41,300,000
Loan outstanding principal balance		150,000,000.0
Unconsolidated Real Estate Ventures
Property Subject to or Available for Operating Lease [Line Items]
Real estate ventures aggregate indebtedness		592,400,000
PJP VII
Property Subject to or Available for Operating Lease [Line Items]
Guarantees, maximum exposure amount		300,000
Loan outstanding principal balance		3,700,000
618 Market Street
Property Subject to or Available for Operating Lease [Line Items]
Contingent consideration, liability	$ 2,000,000.0	2,000,000.0
Fair value of contingent consideration	1,600,000
Interest expense	$ 2,000,000.0
The Bulletin Building
Property Subject to or Available for Operating Lease [Line Items]
Funding requirement met for capital improvements		5,100,000
Expected excess redevelopment funding		39,000,000.0
Estimated aggregate cost		84,800,000
Acquisition cost, inclusive in estimated aggregate cost				$ 37,800,000
Drexel Square
Property Subject to or Available for Operating Lease [Line Items]
Required spending in capital improvements to property		8,500,000
Estimated potential additional contribution obligation		$ 2,900,000
Minimum
Property Subject to or Available for Operating Lease [Line Items]
Lease terms		9 years
Minimum \| The Bulletin Building
Property Subject to or Available for Operating Lease [Line Items]
Required spending in capital improvements to property		$ 8,000,000.0
Maximum
Property Subject to or Available for Operating Lease [Line Items]
Lease terms		65 years
Mortgage Lenders
Property Subject to or Available for Operating Lease [Line Items]
Associated letter of credit		$ 0

Commitments and Contingencies - Lease Payments on Non-cancelable Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
2019 (three months remaining)	$ 303
2020	1,217
2021	1,232
2022	1,248
2023	1,263
Thereafter	111,757
Total lease payments	117,020
Less: Imputed interest	(94,517)
Lease liability - operating leases	$ 22,503	$ 22,400	$ 0
2019			1,222
2020			1,222
2021			1,222
2022			1,222
2023			1,222
Thereafter			55,689
Total			$ 61,799

Subsequent Events (Details) - Subsequent Event	Oct. 10, 2019 USD ($)
Subsequent Event [Line Items]
Proceeds from debt, net of issuance costs	$ 214,300,000
Repayments of unsecured credit facility	145,500,000
Guaranteed Notes Due 2024
Subsequent Event [Line Items]
Indebtedness to third parties, refinanced amount	$ 100,000,000.0
Debt instrument, interest rate, stated percentage	4.10%
Debt instrument issued a a premium, percentage of face amount	106.315%
Debt instrument, re-offer yield	2.669%
Guaranteed Notes Due 2029
Subsequent Event [Line Items]
Indebtedness to third parties, refinanced amount	$ 100,000,000.0
Debt instrument, interest rate, stated percentage	4.55%
Debt instrument issued a a premium, percentage of face amount	110.058%
Debt instrument, re-offer yield	3.331%

Label	Element	Value
Retained Earnings [Member]
Cumulative Effect on Retained Earnings, Net of Tax	us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1	$ (5,336,000)
Subsidiaries [Member]
Cumulative Effect on Retained Earnings, Net of Tax	us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1	(5,336,000)
Subsidiaries [Member] \| General Partner [Member]
Cumulative Effect on Retained Earnings, Net of Tax	us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1	$ (5,336,000)