0000790816-23-000047 | 10-Q | XBRL Viewer

PARTNERS' EQUITY OF THE PARENT COMPANY (Tables)

9 Months Ended

Sep. 30, 2023

Schedule of Earnings Per Share (EPS), Basic and Diluted

The following table details 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,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(21,636)	$	(21,636)	$	13,478	$	13,478
Net (income) loss attributable to noncontrolling interests	82		82		(37)		(37)
Nonforfeitable dividends allocated to unvested restricted shareholders	(159)		(159)		(105)		(105)


Net income (loss) attributable to common shareholders	$	(21,713)	$	(21,713)	$	13,336	$	13,336
Denominator
Weighted-average shares outstanding	172,097,661		172,097,661		171,569,807		171,569,807
Contingent securities/Share based compensation	—		—		—		582,449
Weighted-average shares outstanding	172,097,661		172,097,661		171,569,807		172,152,256
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	(0.13)	$	(0.13)	$	0.08	$	0.08


	Nine Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(39,649)	$	(39,649)	$	24,230	$	24,230
Net (income) loss attributable to noncontrolling interests	140		140		(59)		(59)
Nonforfeitable dividends allocated to unvested restricted shareholders	(433)		(433)		(351)		(351)


Net income (loss) attributable to common shareholders	$	(39,942)	$	(39,942)	$	23,820	$	23,820
Denominator
Weighted-average shares outstanding	171,912,552		171,912,552		171,464,936		171,464,936
Contingent securities/Share based compensation	—		—		—		970,217
Weighted-average shares outstanding	171,912,552		171,912,552		171,464,936		172,435,153
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	(0.23)	$	(0.23)	$	0.14	$	0.14

The following table details 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,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(21,636)	$	(21,636)	$	13,478	$	13,478
Net loss attributable to noncontrolling interests	20		20		1		1
Nonforfeitable dividends allocated to unvested restricted unitholders	(159)		(159)		(105)		(105)


Net income (loss) attributable to common unitholders	$	(21,775)	$	(21,775)	$	13,374	$	13,374
Denominator
Weighted-average units outstanding	172,614,128		172,614,128		172,086,274		172,086,274
Contingent securities/Share based compensation	—		—		—		582,449
Total weighted-average units outstanding	172,614,128		172,614,128		172,086,274		172,668,723
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	$	(0.13)	$	(0.13)	$	0.08	$	0.08


	Nine Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(39,649)	$	(39,649)	$	24,230	$	24,230
Net loss attributable to noncontrolling interests	21		21		5		5
Nonforfeitable dividends allocated to unvested restricted unitholders	(433)		(433)		(351)		(351)


Net income (loss) attributable to common unitholders	$	(40,061)	$	(40,061)	$	23,884	$	23,884
Denominator
Weighted-average units outstanding	172,429,019		172,429,019		172,019,701		172,019,701
Contingent securities/Share based compensation	—		—		—		970,217
Total weighted-average units outstanding	172,429,019		172,429,019		172,019,701		172,989,918
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	$	(0.23)	$	(0.23)	$	0.14	$	0.14

REAL ESTATE INVESTMENTS - Narrative (Details)		3 Months Ended			9 Months Ended
REAL ESTATE INVESTMENTS - Narrative (Details)	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) ft²	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) ft²	Sep. 30, 2022 USD ($)	Jan. 30, 2023 ft²
Real Estate Properties [Line Items]
Net gain on disposition of real estate		$ 0		$ 8,669,000	$ 0	$ 8,813,000
Leaseholds and Leasehold Improvements \| 3151 Market Street
Real Estate Properties [Line Items]
Operating lease costs, capitalized			$ 7,800,000
Rentable area (in square feet) \| ft²							200,000
Net gain from remeasurment of investment in real estate ventures			$ 800,000
Office Properties \| Pennsylvania suburbs segment
Real Estate Properties [Line Items]
Impairment charge		$ 11,700,000
Office Properties \| Three Barton Skyway
Real Estate Properties [Line Items]
Rentable area (in square feet) \| ft²		173,302			173,302
Disposal group, including discontinued operation, consideration		$ 53,300,000			$ 53,300,000
Impairment charge	$ 4,500,000
Net gain on disposition of real estate		$ 0

DEBT OBLIGATIONS - Narrative (Details)				9 Months Ended
DEBT OBLIGATIONS - Narrative (Details)	Sep. 30, 2023 USD ($)	Mar. 01, 2023 USD ($)	Jan. 19, 2023 USD ($) property subsidiary	Sep. 30, 2023 USD ($)	Aug. 15, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Principal balance outstanding	$ 2,143,610,000			$ 2,143,610,000
Unsecured Debt
Debt Instrument [Line Items]
Principal balance outstanding	1,898,610,000			1,898,610,000		$ 1,971,411,000
Secured fixed rate debt
Debt Instrument [Line Items]
Principal balance outstanding	241,654,000			241,654,000		0
$600 million Unsecured Credit Facility \| Unsecured Debt
Debt Instrument [Line Items]
Maximum borrowing capacity (up to)	$ 600,000,000			$ 600,000,000
Weighted-average interest rate	5.13%			5.13%
Interest expense				$ 500,000
Debt instrument, face amount	$ 600,000,000			600,000,000
Principal balance outstanding	$ 0			$ 0		88,500,000
$600 million Unsecured Credit Facility \| Unsecured Debt \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate, Before Adjustment
Debt Instrument [Line Items]
Spread on variable rate				1.05%
$600 million Unsecured Credit Facility \| Unsecured Debt \| Daily SOFR Adjustment
Debt Instrument [Line Items]
Spread on variable rate	0.10%			0.10%
$600 million Unsecured Credit Facility \| Unsecured Debt \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Spread on variable rate				1.15%
Secured Facility \| Secured fixed rate debt
Debt Instrument [Line Items]
Number of wholly owned subsidiaries participating in a loan agreement \| subsidiary			7
Number of operating properties \| property			7
Debt instrument, face amount			$ 245,000,000
Debt instrument, interest rate, stated percentage			5.88%
$70.0 million Term Loan \| Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, face amount	$ 70,000,000	$ 70,000,000.0		$ 70,000,000
Debt instrument, term		1 year
Extension term		12 months
Principal balance outstanding	70,000,000			$ 70,000,000		0
$70.0 million Term Loan \| Unsecured Debt \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate, Before Adjustment
Debt Instrument [Line Items]
Spread on variable rate		1.75%
$70.0 million Term Loan \| Unsecured Debt \| Daily SOFR Adjustment
Debt Instrument [Line Items]
Spread on variable rate		0.10%		0.10%
$70.0 million Term Loan \| Unsecured Debt \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Spread on variable rate				1.85%
$50.0M Construction Loan due 2026
Debt Instrument [Line Items]
Percent of commitment guaranteed					20.00%
$50.0M Construction Loan due 2026 \| Secured fixed rate debt
Debt Instrument [Line Items]
Debt instrument, face amount					$ 50,000,000.0
Principal balance outstanding	$ 0			$ 0		$ 0
$50.0M Construction Loan due 2026 \| Secured fixed rate debt \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					2.50%

DEBT OBLIGATIONS

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

DEBT OBLIGATIONS

7. DEBT OBLIGATIONS

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding as of September 30, 2023 and December 31, 2022 (in thousands):


	September 30, 2023		December 31, 2022		Effective Interest Rate		Maturity Date
SECURED DEBT:



$245.0M 5.88% Secured Term Loan due 2028	$	245,000	—		5.88%		February 2028
$50.0M Construction Loan due 2026	—		—		SOFR + 2.50%		August 2026
Principal balance outstanding	245,000		—

Less: deferred financing costs	(3,346)		—
Total Secured indebtedness	$	241,654	$	—

UNSECURED DEBT
$600 million Unsecured Credit Facility	$	—	$	88,500	SOFR + 1.15%		June 2026	(a)
Term Loan - Swapped to fixed	250,000		250,000		SOFR + 1.30%		June 2027	(b)
$70.0 million Term Loan	70,000		—		SOFR + 1.85%		February 2024	(a)(c)
$350.0M 3.95% Guaranteed Notes due 2023	—		54,301		3.87%		February 2023	(d)
$350.0M 4.10% Guaranteed Notes due 2024	350,000		350,000		3.78%		October 2024
$450.0M 3.95% Guaranteed Notes due 2027	450,000		450,000		4.03%		November 2027
$350.0M 7.55% Guaranteed Notes due 2028	350,000		350,000		7.73%	(f)	March 2028
$350.0M 4.55% Guaranteed Notes due 2029	350,000		350,000		4.30%		October 2029
Indenture IA (Preferred Trust I)	27,062		27,062		SOFR + 1.51	(e)	March 2035
Indenture IB (Preferred Trust I)	25,774		25,774		SOFR + 1.51	(e)	April 2035
Indenture II (Preferred Trust II)	25,774		25,774		SOFR + 1.51	(e)	July 2035
Principal balance outstanding	1,898,610		1,971,411
Plus: original issue premium (discount), net	2,159		2,934
Less: deferred financing costs	(7,963)		(9,307)
Total unsecured indebtedness	$	1,892,806	$	1,965,038
Total Debt Obligations	$	2,134,460	$	1,965,038

(a)Spread includes a 10 basis point daily SOFR adjustment.

(b)On November 23, 2022, the $250.0 million unsecured term loan was swapped to a fixed rate of 5.01% and matures on June 30, 2027. The effective date of the swap was January 31, 2023.

(c)The maturity date of the $70.0 million unsecured term loan is subject to a 12 month optional extension upon customary terms and conditions.

(d)On January 20, 2023, the Company redeemed in full its then outstanding 3.95% Guaranteed Notes due 2023 (the “2023 Notes”). The aggregate redemption price of the 2023 Notes was approximately $55.2 million (approximately $54.3 million in principal and approximately $0.92 million of accrued and unpaid interest).

(e)On July 1, 2023, the stated rate of interest was replaced with 3-month CME Term SOFR + 1.51%. The rate will be in effect as the existing 3-month LIBOR interest periods expire over the next three months.

(f)During the third quarter of 2023, Moody’s downgraded our senior unsecured credit rating from Baa3 to Ba1. As a result of the downgrade, the interest rate on our 7.55% note due 2028 increased 25 basis points in September 2023 due to the coupon adjustment provisions within the note.

The Company utilizes borrowings under its unsecured credit facility (the “Unsecured Credit Facility”) for general business purposes, including to fund costs of acquisitions, developments and redevelopments of properties, fund share repurchases and repay other debt. The Unsecured Credit Facility provides for borrowings of up to $600.0 million and the per annum variable interest rate on borrowings is SOFR plus 1.05% plus a spread adjustment of 0.10%. 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, 2023, the weighted-average interest rate on Unsecured Credit Facility borrowings was 5.13%, resulting in $0.5 million of interest expense for such period.

Secured Facility due 2028

On January 19, 2023, seven indirect wholly-owned subsidiaries of the Company entered into a term loan agreement secured by seven operating properties in the aggregate principal amount of $245.0 million (the “Secured Facility”). The Secured Facility has a scheduled maturity date of February 6, 2028 and may be prepaid in full on or after March 6, 2025, subject to a prepayment premium, and may be prepaid in full on or after August 6, 2027 without any prepayment premium. The Secured Facility bears interest at 5.88% per year through the maturity date and is interest-only (payable monthly) through the maturity date.

2023 Unsecured Term Loan

On March 1, 2023, the Company entered into an unsecured one-year term loan agreement in the aggregate principal amount of $70.0 million (the “2023 Term Loan”). The 2023 Term Loan has a scheduled maturity date of February 28, 2024 with an option to extend for an additional twelve months upon customary terms and conditions. The 2023 Term Loan bears interest at Daily Simple SOFR plus 1.75%, with a 0.10% SOFR adjustment per year through the maturity date and is interest-only (payable monthly) through the maturity date.

Secured Construction Loan due 2026

On August 15, 2023, the Company entered into a construction loan agreement secured by the development project at 155 King of Prussia Road in Radnor, Pennsylvania in the aggregate principal amount of $50.0 million (the “Construction Loan”). The Construction Loan has a scheduled maturity date of August 16, 2026 with an option to prepay at any time without a fee, premium or penalty. The Construction Loan bears interest at SOFR plus 2.5%.

In connection with the Construction Loan, the Company has provided a completion guaranty, carry guaranty, and limited payment guarantee up to 20% of the loan commitment, as well as customary environmental indemnities and guaranty of customary exceptions to non-recourse provisions in the loan documents.

Additional Information on Unsecured and Secured Consolidated Debt

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, 2023. Certain of the covenants restrict the Company’s ability to obtain alternative sources of capital.

As of September 30, 2023, the aggregate scheduled principal payments on the Company’s consolidated debt obligations (secured and unsecured) were as follows (in thousands):


2023 (three months remaining)	$	—
2024	350,000
2025	70,000
2026	—
2027	700,000
Thereafter	1,023,610
Total principal payments	2,143,610
Net unamortized premiums/(discounts)	2,159
Net deferred financing costs	(11,309)
Outstanding indebtedness	$	2,134,460

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

SEGMENT INFORMATION - Real Estate Investments, at Cost of Company's Reportable Segments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating properties	$ 3,694,633	$ 3,617,240
Right of use asset - operating leases, net	19,188	19,664
Construction-in-progress	143,929	218,869
Land held for development	76,058	76,499
Prepaid leasehold interests in land held for development, net	27,762	35,576
Continuing Operations
Segment Reporting Information [Line Items]
Operating properties	3,696,066	3,617,240
Total Core Segments \| Continuing Operations
Segment Reporting Information [Line Items]
Operating properties	3,235,523	3,248,182
Philadelphia CBD \| Continuing Operations
Segment Reporting Information [Line Items]
Operating properties	1,521,723	1,517,801
Pennsylvania Suburbs \| Continuing Operations
Segment Reporting Information [Line Items]
Operating properties	915,659	878,546
Austin, Texas \| Continuing Operations
Segment Reporting Information [Line Items]
Operating properties	798,141	851,835
Other \| Continuing Operations
Segment Reporting Information [Line Items]
Operating properties	$ 460,543	$ 369,058

INTANGIBLE ASSETS AND LIABILITIES - Summary of Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Intangible Assets [Line Items]
Total Cost	$ 27,291	$ 56,213
Accumulated Amortization	(18,752)	(37,762)
Intangible Assets, net	8,539	18,451
Total Cost	17,783	20,985
Accumulated Amortization	(9,247)	(10,663)
Intangible Liabilities, net	8,536	10,322
In-place lease value
Intangible Assets [Line Items]
Total Cost	27,003	55,715
Accumulated Amortization	(18,553)	(37,437)
Intangible Assets, net	8,450	18,278
Tenant relationship value
Intangible Assets [Line Items]
Total Cost	110	167
Accumulated Amortization	(51)	(104)
Intangible Assets, net	59	63
Above market leases acquired
Intangible Assets [Line Items]
Total Cost	178	331
Accumulated Amortization	(148)	(221)
Intangible Assets, net	$ 30	$ 110

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2023

Jun. 30, 2023

Mar. 31, 2023

Sep. 30, 2022

Jun. 30, 2022

Mar. 31, 2022

Sep. 30, 2023

Sep. 30, 2022

Statement of Comprehensive Income [Abstract]

Net income (loss)

$ (21,636)

$ (12,737)

$ (5,276)

$ 13,478

$ 4,651

$ 6,101

$ (39,649)

$ 24,230

Comprehensive income:

Unrealized gain on derivative financial instruments

2,885

490

4,240

6,001

Amortization of interest rate contracts

^[1]

188

564

Total comprehensive income

2,885

$ 6,646

$ (5,291)

678

$ 1,935

$ 3,952

4,240

6,565

Comprehensive income (loss)

(18,751)

14,156

(35,409)

30,795

Comprehensive (income) loss attributable to noncontrolling interest

106

(39)

128

(79)

Comprehensive income (loss) attributable to Brandywine Realty Trust

$ (18,645)

$ 14,117

$ (35,281)

$ 30,716

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

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

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-Name Accounting Standards Codification
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+ Details

- Definition

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

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+ Details

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, 2023 ft² property
Real Estate Properties [Line Items]
Number of Properties \| property	74
Rentable Square Feet \| ft²	13,179,875
Core Properties
Real Estate Properties [Line Items]
Number of Properties \| property	70
Rentable Square Feet \| ft²	12,598,531
Office properties
Real Estate Properties [Line Items]
Number of Properties \| property	65
Rentable Square Feet \| ft²	11,656,197
Mixed-use properties
Real Estate Properties [Line Items]
Number of Properties \| property	5
Rentable Square Feet \| ft²	942,334
Development property
Real Estate Properties [Line Items]
Number of Properties \| property	1
Rentable Square Feet \| ft²	144,685
Redevelopment properties
Real Estate Properties [Line Items]
Number of Properties \| property	2
Rentable Square Feet \| ft²	268,365
Recently completed - not stabilized property
Real Estate Properties [Line Items]
Number of Properties \| property	1
Rentable Square Feet \| ft²	168,294

REAL ESTATE INVESTMENTS (Tables)

9 Months Ended

Sep. 30, 2023

Real Estate [Abstract]

Schedule of Gross Carrying Value of Operating Properties

As of September 30, 2023 and December 31, 2022, the gross carrying value of the operating properties was as follows (in thousands):


	September 30, 2023		December 31, 2022
Land	$	414,179	$	403,998
Building and improvements	2,783,304		2,760,357
Tenant improvements	498,583		452,885


Total	$	3,696,066	$	3,617,240

CONSOLIDATED STATEMENTS OF BENEFICIARIES’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Rabbi Trust/Deferred Compensation Shares	Additional Paid-in Capital	Common Shares in Grantor Trust	Cumulative Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Distributions	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2021		171,126,257	1,169,703
Beginning balance at Dec. 31, 2021	$ 1,701,219	$ 1,712	$ 18,491	$ 3,146,786	$ (18,491)	$ 1,122,372	$ (2,020)	$ (2,578,583)	$ 10,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,101					6,093			8
Other comprehensive income (loss)	3,952						3,940		12
Redemption of LP Units	(4,006)								(4,006)
Share-based compensation activity (in shares)		277,061	68,540
Share-based compensation activity	1,655	$ 2		1,653
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(19,406)	(52,702)
Share Issuance from/(to) Deferred Compensation Plan	(249)		$ 895	(249)	(895)
Reallocation of Noncontrolling interest	0			(959)					959
Distributions declared	(32,809)							(32,711)	(98)
Ending balance (in shares) at Mar. 31, 2022		171,383,912	1,185,541
Ending balance at Mar. 31, 2022	$ 1,675,863	$ 1,714	$ 19,386	3,147,231	(19,386)	1,128,465	1,920	(2,611,294)	7,827
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Beginning balance (in shares) at Dec. 31, 2021		171,126,257	1,169,703
Beginning balance at Dec. 31, 2021	$ 1,701,219	$ 1,712	$ 18,491	3,146,786	(18,491)	1,122,372	(2,020)	(2,578,583)	10,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,230
Other comprehensive income (loss)	6,565
Ending balance (in shares) at Sep. 30, 2022		171,569,807	1,179,643
Ending balance at Sep. 30, 2022	1,634,949	$ 1,716	$ 19,601	3,151,177	(19,601)	1,146,543	4,525	(2,676,702)	7,690
Beginning balance (in shares) at Mar. 31, 2022		171,383,912	1,185,541
Beginning balance at Mar. 31, 2022	1,675,863	$ 1,714	$ 19,386	3,147,231	(19,386)	1,128,465	1,920	(2,611,294)	7,827
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,651					4,637			14
Other comprehensive income (loss)	1,935						1,929		6
Share-based compensation activity (in shares)		191,368	16,844
Share-based compensation activity	1,917	$ 2		1,915
Share Issuance from/(to) Deferred Compensation Plan	0		$ 215		(215)
Distributions declared	(32,803)							(32,705)	(98)
Ending balance (in shares) at Jun. 30, 2022		171,575,280	1,202,385
Ending balance at Jun. 30, 2022	$ 1,651,563	$ 1,716	$ 19,601	3,149,146	(19,601)	1,133,102	3,849	(2,643,999)	7,749
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Net income (loss)	$ 13,478					13,441			37
Other comprehensive income (loss)	678						676		2
Share-based compensation activity (in shares)		1,100
Share-based compensation activity	2,094			2,094
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(6,573)	(22,742)
Share Issuance from/(to) Deferred Compensation Plan	(63)			(63)
Distributions declared	(32,801)							(32,703)	(98)
Ending balance (in shares) at Sep. 30, 2022		171,569,807	1,179,643
Ending balance at Sep. 30, 2022	$ 1,634,949	$ 1,716	$ 19,601	3,151,177	(19,601)	1,146,543	4,525	(2,676,702)	7,690
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Beginning balance (in shares) at Dec. 31, 2022	171,569,807	171,569,807	1,179,643
Beginning balance at Dec. 31, 2022	$ 1,633,334	$ 1,716	$ 19,601	3,153,229	(19,601)	1,176,195	3,897	(2,709,405)	7,702
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,276)					(5,259)			(17)
Other comprehensive income (loss)	(5,291)						(5,307)		16
Share-based compensation activity (in shares)		171,318	22,449
Share-based compensation activity	3,371	$ 1		3,370
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(13,422)	(48,733)
Share Issuance from/(to) Deferred Compensation Plan	(88)		$ 145	(88)	(145)
Reallocation of Noncontrolling interest	0			(4)					4
Distributions declared	(32,832)							(32,734)	(98)
Ending balance (in shares) at Mar. 31, 2023		171,727,703	1,153,359
Ending balance at Mar. 31, 2023	$ 1,593,218	$ 1,717	$ 19,746	3,156,507	(19,746)	1,170,936	(1,410)	(2,742,139)	7,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Beginning balance (in shares) at Dec. 31, 2022	171,569,807	171,569,807	1,179,643
Beginning balance at Dec. 31, 2022	$ 1,633,334	$ 1,716	$ 19,601	3,153,229	(19,601)	1,176,195	3,897	(2,709,405)	7,702
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(39,649)
Other comprehensive income (loss)	$ 4,240
Ending balance (in shares) at Sep. 30, 2023	172,097,661	172,097,661	1,194,127
Ending balance at Sep. 30, 2023	$ 1,514,368	$ 1,719	$ 19,965	3,161,568	(19,965)	1,136,686	8,125	(2,801,074)	7,344
Beginning balance (in shares) at Mar. 31, 2023		171,727,703	1,153,359
Beginning balance at Mar. 31, 2023	1,593,218	$ 1,717	$ 19,746	3,156,507	(19,746)	1,170,936	(1,410)	(2,742,139)	7,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(12,737)					(12,696)			(41)
Other comprehensive income (loss)	6,646						6,626		20
Share-based compensation activity (in shares)		374,226	54,056
Share-based compensation activity	2,616	$ 2		2,614
Share Issuance from/(to) Deferred Compensation Plan	0		$ 219		(219)
Reallocation of Noncontrolling interest	0			155					(155)
Distributions declared	(33,083)							(32,985)	(98)
Ending balance (in shares) at Jun. 30, 2023		172,101,929	1,207,415
Ending balance at Jun. 30, 2023	$ 1,556,660	$ 1,719	$ 19,965	3,159,276	(19,965)	1,158,240	5,216	(2,775,124)	7,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Net income (loss)	$ (21,636)					(21,554)			(82)
Other comprehensive income (loss)	2,885						2,909		(24)
Share-based compensation activity	2,506			2,506
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(4,268)	(13,288)
Share Issuance from/(to) Deferred Compensation Plan	(20)			(20)
Reallocation of Noncontrolling interest	0			(194)					194
Distributions declared	$ (26,027)							(25,950)	(77)
Ending balance (in shares) at Sep. 30, 2023	172,097,661	172,097,661	1,194,127
Ending balance at Sep. 30, 2023	$ 1,514,368	$ 1,719	$ 19,965	$ 3,161,568	$ (19,965)	$ 1,136,686	$ 8,125	$ (2,801,074)	$ 7,344
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.15

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue
Total revenue	$ 129,372			$ 125,569			$ 384,481	$ 377,116
Operating expenses
Property operating expenses	31,123			32,624			96,608	97,283
Real estate taxes	12,808			12,313			38,981	39,872
Third party management expenses	2,468			2,549			7,664	7,898
Depreciation and amortization	48,966			45,134			141,645	132,875
General and administrative expenses	8,069			7,564			26,911	25,892
Provision for impairment	11,666			0			16,134	0
Total operating expenses	115,100			100,184			327,943	303,820
Gain on sale of real estate
Net gain on disposition of real estate	0			8,669			0	8,813
Net gain on sale of undepreciated real estate	0			2,983			781	8,007
Total gain on sale of real estate	0			11,652			781	16,820
Operating income	14,272			37,037			57,319	90,116
Other income (expense):
Interest income	293			498			1,318	1,387
Interest expense	(24,355)			(17,061)			(70,677)	(49,144)
Interest expense - amortization of deferred financing costs	(1,110)			(745)			(3,251)	(2,259)
Equity in loss of unconsolidated real estate ventures	(10,739)			(6,260)			(24,504)	(15,804)
Net gain on real estate venture transactions	0			0			181	0
Net income (loss) before income taxes	(21,639)			13,469			(39,614)	24,296
Income tax benefit (provision)	3			9			(35)	(66)
Net income (loss)	(21,636)	$ (12,737)	$ (5,276)	13,478	$ 4,651	$ 6,101	(39,649)	24,230
Net (income) loss attributable to noncontrolling interests	82			(37)			140	(59)
Net income (loss) attributable to Brandywine Realty Trust	(21,554)			13,441			(39,509)	24,171
Nonforfeitable dividends allocated to unvested restricted shareholders	(159)			(105)			(433)	(351)
Net income (loss) attributable to Common Shareholders of Brandywine Realty Trust	$ (21,713)			$ 13,336			$ (39,942)	$ 23,820
Basic income (loss) per Common Share (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14
Diluted income (loss) per Common Share (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14
Basic weighted average shares outstanding (in shares)	172,097,661			171,569,807			171,912,552	171,464,936
Diluted weighted average shares outstanding (in shares)	172,097,661			172,152,256			171,912,552	172,435,153
Rents
Revenue
Total revenue	$ 121,661			$ 117,481			$ 360,642	$ 350,279
Third party management fees, labor reimbursement and leasing
Revenue
Total revenue	6,553			6,872			18,782	17,904
Other
Revenue
Total revenue	$ 1,158			$ 1,216			$ 5,057	$ 8,933

CONSOLIDATED STATEMENTS OF BENEFICIARIES’ EQUITY (Parenthetical) - $ / shares		3 Months Ended
	Sep. 20, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Distributions declared (in dollars per share)	$ 0.15	$ 0.15	$ 0.19	$ 0.19	$ 0.19	$ 0.19	$ 0.19

BENEFICIARIES' EQUITY OF THE PARENT COMPANY - Narrative (Details) - USD ($)			3 Months Ended						9 Months Ended
	Oct. 18, 2023	Sep. 20, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Jan. 03, 2019
Class of Stock [Line Items]
Distributions declared (in dollars per share)		$ 0.15	$ 0.15	$ 0.19	$ 0.19	$ 0.19	$ 0.19	$ 0.19
Dividends, common stock		$ 26,000,000
Stock repurchase program, authorized amount											$ 150,000,000
Shares repurchased and retired (in shares)									0	0
Subsequent Event
Class of Stock [Line Items]
Dividends paid in cash (in dollars per share)	$ 0.15
Redeemable Common Limited Partnership Units
Class of Stock [Line Items]
Redeemable common limited partnership units (in shares)									516,467	516,467

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483014/272-10-45-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482987/272-10-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(d))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-14

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-18

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

+ Details

DEBT OBLIGATIONS - Scheduled Principal Payments of Debt Obligation, Excluding Amortization of Discounts and Premiums (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
2023 (three months remaining)	$ 0
2024	350,000
2025	70,000
2026	0
2027	700,000
Thereafter	1,023,610
Total principal payments	2,143,610
Net unamortized premiums/(discounts)	2,159
Net deferred financing costs	(11,309)
Outstanding indebtedness	$ 2,134,460	$ 1,965,038

CONSOLIDATED STATEMENTS OF CASH FLOWS - BRANDYWINE OPERATING PARTNERSHIP L.P. - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ (39,649)	$ 24,230
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	141,645	132,875
Amortization of deferred financing costs	3,251	2,259
Amortization of debt discount/(premium), net	(774)	(1,463)
Amortization of stock compensation costs	8,305	7,232
Straight-line rent income	(6,612)	(8,958)
Amortization of acquired above (below) market leases, net	(993)	(2,189)
Ground rent expense	601	611
Net gain on real estate venture transactions	(181)	0
Total gain on sale of real estate	(781)	(16,820)
Provision for impairment	16,134	0
Loss from unconsolidated real estate ventures, including income distributions	24,504	15,049
Income tax provision	35	66
Changes in assets and liabilities:
Accounts receivable	(2,362)	933
Other assets	(24,619)	(9,949)
Accounts payable and accrued expenses	(8,992)	3,240
Deferred income, gains and rent	(1,196)	(666)
Other liabilities	3,089	1,712
Net cash provided by operating activities	111,405	148,162
Cash flows from investing activities:
Acquisition of properties	0	(3,446)
Proceeds from the sale of properties	51,285	35,462
Capital expenditures for tenant improvements	(34,219)	(67,782)
Capital expenditures for redevelopments	(42,592)	(74,383)
Capital expenditures for developments	(30,149)	(82,507)
Advances for the purchase of tenant assets, net of repayments	(9,292)	(447)
Investment in unconsolidated real estate ventures	(72,715)	(43,681)
Deposits for real estate	3,500	(7,450)
Capital distributions from unconsolidated real estate ventures	2,700	8,930
Leasing costs paid	(7,969)	(20,096)
Net cash used in investing activities	(139,451)	(255,400)
Cash flows from financing activities:
Proceeds from credit facility borrowings	172,000	260,000
Repayments of credit facility borrowings	(260,500)	(37,000)
Repayments of unsecured notes	(54,301)	0
Proceeds from unsecured term loan	70,000	0
Proceeds from secured term loan	245,000	0
Debt financing costs paid	(4,371)	(6,641)
Shares used for employee taxes upon vesting of share awards	(952)	(2,941)
Redemption of limited partnership units	0	(4,006)
Distributions paid to preferred and common partnership units	(98,306)	(98,020)
Net cash provided by financing activities	68,276	111,039
Increase in cash and cash equivalents and restricted cash	40,230	3,801
Cash and cash equivalents and restricted cash at beginning of period	18,387	28,300
Cash and cash equivalents and restricted cash at end of period	58,617	32,101
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	17,551	27,463
Restricted cash, beginning of period	836	837
Cash and cash equivalents and restricted cash at beginning of period	18,387	28,300
Cash and cash equivalents, end of period	47,872	31,198
Restricted cash, end of period	10,745	903
Cash and cash equivalents and restricted cash at end of period	58,617	32,101
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2023 and 2022 of $12,602 and $7,274, respectively	73,217	47,711
Cash paid for income taxes	550	902
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	26,027	32,805
Change in investment in real estate ventures as a result of deconsolidation	8,595	107,057
Change in operating real estate from deconsolidation of operating properties	(7,814)	(105,405)
Change in other assets as a result of deconsolidation of operating properties	0	(1,652)
Change in other assets as a result of investing activities	0	13,396
Change in capital expenditures financed through accounts payable at period end	4,276	(11,020)
Change in capital expenditures financed through retention payable at period end	2,587	(4,609)
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Cash flows from operating activities:
Net income (loss)	(39,649)	24,230
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	141,645	132,875
Amortization of deferred financing costs	3,251	2,259
Amortization of debt discount/(premium), net	(774)	(1,463)
Amortization of stock compensation costs	8,305	7,232
Straight-line rent income	(6,612)	(8,958)
Amortization of acquired above (below) market leases, net	(993)	(2,189)
Ground rent expense	601	611
Net gain on real estate venture transactions	(181)	0
Total gain on sale of real estate	(781)	(16,820)
Provision for impairment	16,134	0
Loss from unconsolidated real estate ventures, including income distributions	24,504	15,049
Income tax provision	35	66
Changes in assets and liabilities:
Accounts receivable	(2,362)	933
Other assets	(24,619)	(9,949)
Accounts payable and accrued expenses	(8,992)	3,240
Deferred income, gains and rent	(1,196)	(666)
Other liabilities	3,089	1,712
Net cash provided by operating activities	111,405	148,162
Cash flows from investing activities:
Acquisition of properties	0	(3,446)
Proceeds from the sale of properties	51,285	35,462
Capital expenditures for tenant improvements	(34,219)	(67,782)
Capital expenditures for redevelopments	(42,592)	(74,383)
Capital expenditures for developments	(30,149)	(82,507)
Advances for the purchase of tenant assets, net of repayments	(9,292)	(447)
Investment in unconsolidated real estate ventures	(72,715)	(43,681)
Deposits for real estate	3,500	(7,450)
Capital distributions from unconsolidated real estate ventures	2,700	8,930
Leasing costs paid	(7,969)	(20,096)
Net cash used in investing activities	(139,451)	(255,400)
Cash flows from financing activities:
Proceeds from credit facility borrowings	172,000	260,000
Repayments of credit facility borrowings	(260,500)	(37,000)
Repayments of unsecured notes	(54,301)	0
Proceeds from unsecured term loan	70,000	0
Proceeds from secured term loan	245,000	0
Debt financing costs paid	(4,371)	(6,641)
Shares used for employee taxes upon vesting of share awards	(952)	(2,941)
Redemption of limited partnership units	0	(4,006)
Distributions paid to preferred and common partnership units	(98,600)	(98,373)
Net cash provided by financing activities	68,276	111,039
Increase in cash and cash equivalents and restricted cash	40,230	3,801
Cash and cash equivalents and restricted cash at beginning of period	18,387	28,300
Cash and cash equivalents and restricted cash at end of period	58,617	32,101
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	17,551	27,463
Restricted cash, beginning of period	836	837
Cash and cash equivalents and restricted cash at beginning of period	18,387	28,300
Cash and cash equivalents, end of period	47,872	31,198
Restricted cash, end of period	10,745	903
Cash and cash equivalents and restricted cash at end of period	58,617	32,101
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2023 and 2022 of $12,602 and $7,274, respectively	73,217	47,711
Cash paid for income taxes	550	902
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	26,027	32,805
Change in investment in real estate ventures as a result of deconsolidation	8,595	107,057
Change in operating real estate from deconsolidation of operating properties	(7,814)	(105,405)
Change in other assets as a result of deconsolidation of operating properties	0	(1,652)
Change in other assets as a result of investing activities	0	13,396
Change in capital expenditures financed through accounts payable at period end	4,276	(11,020)
Change in capital expenditures financed through retention payable at period end	$ 2,587	$ (4,609)

ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP - Narrative (Details)	9 Months Ended
	Sep. 30, 2023 ft² a property parcel
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of real estate properties \| property	74
Rentable square feet	13,179,875
Unconsolidated Properties \| Unconsolidated Real Estate Ventures
Organization of The Parent Company and The Operating Partnership [Line Items]
Number of real estate properties \| property	12
Parent Company
Organization of The Parent Company and The Operating Partnership [Line Items]
Rentable square feet	12,700,000
Areas of land held for development (in acres) \| a	152.1
Lease agreement term	99 years
Area of additional undeveloped parcels of land with option to purchase (in acres) \| a	55.1
Parent Company \| Parcel of land
Organization of The Parent Company and The Operating Partnership [Line Items]
Lease agreement term	99 years
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	0.8
Number of parcels of land \| parcel	1
Wholly-owned Management Company Subsidiaries
Organization of The Parent Company and The Operating Partnership [Line Items]
Rentable square feet	22,700,000
Wholly-owned Management Company Subsidiaries \| Wholly Owned Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Rentable square feet	13,200,000
Wholly-owned Management Company Subsidiaries \| Partially Owned Properties
Organization of The Parent Company and The Operating Partnership [Line Items]
Rentable square feet	9,500,000
Brandywine Operating Partnership LP
Organization of The Parent Company and The Operating Partnership [Line Items]
Ownership in the operating partnership	99.70%

CONSOLIDATED STATEMENTS OF OPERATIONS - BRANDYWINE OPERATING PARTNERSHIP, L.P. - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue
Total revenue	$ 129,372	$ 125,569	$ 384,481	$ 377,116
Operating expenses
Property operating expenses	31,123	32,624	96,608	97,283
Real estate taxes	12,808	12,313	38,981	39,872
Third party management expenses	2,468	2,549	7,664	7,898
Depreciation and amortization	48,966	45,134	141,645	132,875
General and administrative expenses	8,069	7,564	26,911	25,892
Provision for impairment	11,666	0	16,134	0
Total operating expenses	115,100	100,184	327,943	303,820
Gain on sale of real estate
Net gain on disposition of real estate	0	8,669	0	8,813
Net gain on sale of undepreciated real estate	0	2,983	781	8,007
Total gain on sale of real estate	0	11,652	781	16,820
Operating income	14,272	37,037	57,319	90,116
Other income (expense):
Interest income	293	498	1,318	1,387
Interest expense	(24,355)	(17,061)	(70,677)	(49,144)
Interest expense - amortization of deferred financing costs	(1,110)	(745)	(3,251)	(2,259)
Equity in loss of unconsolidated real estate ventures	(10,739)	(6,260)	(24,504)	(15,804)
Net gain on real estate venture transactions	0	0	181	0
Net income (loss) before income taxes	(21,639)	13,469	(39,614)	24,296
Income tax benefit (provision)	3	9	(35)	(66)
Net income (loss)	(21,636)	13,478	(39,649)	24,230
Nonforfeitable dividends allocated to unvested restricted shareholders	(159)	(105)	(433)	(351)
Net income (loss) attributable to Common Shareholders of Brandywine Realty Trust	$ (21,713)	$ 13,336	$ (39,942)	$ 23,820
Basic income (loss) per Common Share (in dollars per share)	$ (0.13)	$ 0.08	$ (0.23)	$ 0.14
Diluted income (loss) per Common Share (in dollars per share)	$ (0.13)	$ 0.08	$ (0.23)	$ 0.14
Basic weighted average common partnership units outstanding (in shares)	172,097,661	171,569,807	171,912,552	171,464,936
Diluted weighted average common partnership units outstanding (in shares)	172,097,661	172,152,256	171,912,552	172,435,153
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Total revenue	$ 129,372	$ 125,569	$ 384,481	$ 377,116
Operating expenses
Property operating expenses	31,123	32,624	96,608	97,283
Real estate taxes	12,808	12,313	38,981	39,872
Third party management expenses	2,468	2,549	7,664	7,898
Depreciation and amortization	48,966	45,134	141,645	132,875
General and administrative expenses	8,069	7,564	26,911	25,892
Provision for impairment	11,666	0	16,134	0
Total operating expenses	115,100	100,184	327,943	303,820
Gain on sale of real estate
Net gain on disposition of real estate	0	8,669	0	8,813
Net gain on sale of undepreciated real estate	0	2,983	781	8,007
Total gain on sale of real estate	0	11,652	781	16,820
Operating income	14,272	37,037	57,319	90,116
Other income (expense):
Interest income	293	498	1,318	1,387
Interest expense	(24,355)	(17,061)	(70,677)	(49,144)
Interest expense - amortization of deferred financing costs	(1,110)	(745)	(3,251)	(2,259)
Equity in loss of unconsolidated real estate ventures	(10,739)	(6,260)	(24,504)	(15,804)
Net gain on real estate venture transactions	0	0	181	0
Net income (loss) before income taxes	(21,639)	13,469	(39,614)	24,296
Income tax benefit (provision)	3	9	(35)	(66)
Net income (loss)	(21,636)	13,478	(39,649)	24,230
Net loss attributable to noncontrolling interests - consolidated real estate ventures	20	1	21	5
Net income (loss) attributable to Brandywine Operating Partnership	(21,616)	13,479	(39,628)	24,235
Nonforfeitable dividends allocated to unvested restricted shareholders	(159)	(105)	(433)	(351)
Net income (loss) attributable to Common Shareholders of Brandywine Realty Trust	$ (21,775)	$ 13,374	$ (40,061)	$ 23,884
Basic income (loss) per Common Share (in dollars per share)	$ (0.13)	$ 0.08	$ (0.23)	$ 0.14
Diluted income (loss) per Common Share (in dollars per share)	$ (0.13)	$ 0.08	$ (0.23)	$ 0.14
Basic weighted average common partnership units outstanding (in shares)	172,614,128	172,086,274	172,429,019	172,019,701
Diluted weighted average common partnership units outstanding (in shares)	172,614,128	172,668,723	172,429,019	172,989,918
Rents
Revenue
Total revenue	$ 121,661	$ 117,481	$ 360,642	$ 350,279
Rents \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Total revenue	121,661	117,481	360,642	350,279
Third party management fees, labor reimbursement and leasing
Revenue
Total revenue	6,553	6,872	18,782	17,904
Third party management fees, labor reimbursement and leasing \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Total revenue	6,553	6,872	18,782	17,904
Other
Revenue
Total revenue	1,158	1,216	5,057	8,933
Other \| BRANDYWINE OPERATING PARTNERSHIP, L.P.
Revenue
Total revenue	$ 1,158	$ 1,216	$ 5,057	$ 8,933

SEGMENT INFORMATION

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

SEGMENT INFORMATION

13. SEGMENT INFORMATION

As of September 30, 2023, the Company owns and manages properties within four segments: (1) Philadelphia Central Business District (“Philadelphia CBD”), (2) Pennsylvania Suburbs, (3) Austin, Texas and (4) 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 Other segment includes properties located in the District of Columbia, Northern Virginia, Southern Maryland, Camden County, New Jersey and New Castle County, Delaware. In addition to the four 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 Company’s segments are based on the Company’s method of internal reporting, which classifies the Company's operations by geographic area. Beginning on January 1, 2023, the properties that were historically part of the Metropolitan Washington D.C. segment are reflected in the other reportable segment. The operations for the Metropolitan Washington D.C. segment for the three and nine months ended September 30, 2023 and real estate investments as of September 30, 2023 and December 31, 2022, as detailed below, have been included in the Other reportable segment. 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, 2023		December 31, 2022
Philadelphia CBD	$	1,521,723	$	1,517,801
Pennsylvania Suburbs	915,659		878,546
Austin, Texas	798,141		851,835
Total Core Segments	3,235,523		3,248,182
Other	460,543		369,058


Operating properties	$	3,696,066	$	3,617,240

Corporate
Right of use asset - operating leases, net	$	19,188	$	19,664
Construction-in-progress	$	143,929	$	218,869
Land held for development	$	76,058	$	76,499
Prepaid leasehold interests in land held for development, net	$	27,762	$	35,576

Net operating income:


	Three Months Ended September 30,
	2023						2022
	Total revenue		Operating expenses (a)		Net operating income		Total revenue		Operating expenses (a)		Net operating income
Philadelphia CBD	$	56,367	$	(18,609)	$	37,758	$	56,105	$	(20,080)	$	36,025
Pennsylvania Suburbs	32,611		(9,770)		22,841		32,709		(11,022)		21,687
Austin, Texas	24,457		(10,044)		14,413		22,509		(8,597)		13,912
Other	10,295		(5,526)		4,769		8,874		(5,089)		3,785

Corporate	5,642		(2,450)		3,192		5,372		(2,698)		2,674
Operating properties	$	129,372	$	(46,399)	$	82,973	$	125,569	$	(47,486)	$	78,083


	Nine Months Ended September 30,
	2023						2022
	Total revenue		Operating expenses (a)		Net operating income		Total revenue		Operating expenses (a)		Net operating income
Philadelphia CBD	$	169,265	$	(59,452)	$	109,813	$	165,002	$	(60,361)	$	104,641
Pennsylvania Suburbs	97,484		(29,633)		67,851		95,849		(31,438)		64,411
Austin, Texas	73,475		(30,021)		43,454		71,345		(29,328)		42,017
Other	28,572		(15,788)		12,784		27,078		(15,985)		11,093
Corporate	15,685		(8,359)		7,326		17,842		(7,941)		9,901
Operating properties	$	384,481	$	(143,253)	$	241,228	$	377,116	$	(145,053)	$	232,063

Includes property operating expenses, real estate taxes and third-party management expense.


Unconsolidated real estate ventures:
	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, 2023		December 31, 2022		2023		2022		2023		2022
Philadelphia CBD	$	453,917	$	387,301	$	(6,537)	$	(3,452)	$	(14,208)	$	(8,798)
Metropolitan Washington, D.C.	82,350		83,903		(1,306)		(706)		(3,896)		(1,273)
Mid-Atlantic Office JV	28,335		31,005		182		(83)		595		234
MAP Venture	(45,148)		(35,411)		(3,078)		(2,019)		(6,995)		(5,967)

Austin, Texas	73,494		65,426		—		—		—		—
Total	$	592,948	$	532,224	$	(10,739)	$	(6,260)	$	(24,504)	$	(15,804)

Net operating income (“NOI”) is a non-GAAP financial measure, which we define 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. NOI presented by the Company may not be comparable to NOI reported by other companies that define NOI differently. NOI is the primary 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 (loss), as defined by GAAP, to consolidated NOI, (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net income (loss)	$	(21,636)	$	13,478	$	(39,649)	$	24,230
Plus:
Interest expense	24,355		17,061		70,677		49,144
Interest expense - amortization of deferred financing costs	1,110		745		3,251		2,259

Depreciation and amortization	48,966		45,134		141,645		132,875
General and administrative expenses	8,069		7,564		26,911		25,892
Equity in loss of unconsolidated real estate ventures	10,739		6,260		24,504		15,804
Provision for impairment	11,666		—		16,134		—

Less:
Interest income	293		498		1,318		1,387
Income tax benefit (provision)	3		9		(35)		(66)

Net gain on disposition of real estate	—		8,669		—		8,813
Net gain on sale of undepreciated real estate	—		2,983		781		8,007
Net gain on real estate venture transactions	—		—		181		—

Consolidated net operating income	$	82,973	$	78,083	$	241,228	$	232,063

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//280/tableOfContent

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-26

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-34

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

+ Details

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Jul. 23, 2021
Loss Contingencies [Line Items]
Investment in real estate ventures	$ 592,948	$ 532,224
3025 JFK Venture \| Affiliated Entity
Loss Contingencies [Line Items]
Construction Loan			$ 186,700
Drexel Square
Loss Contingencies [Line Items]
Contractual obligation	6,600
Estimated potential additional contribution obligation	2,200
3151 Market Street
Loss Contingencies [Line Items]
Construction loan amount	22,900
Investment in real estate ventures	316,900
3025 JFK Venture
Loss Contingencies [Line Items]
Limited payment guarantee, percent of principle balance (up to)			25.00%
One Uptown Venture
Loss Contingencies [Line Items]
Equity method investment, additional summarized financial information debt			$ 4,000
One Uptown Venture \| Carry Guarantee
Loss Contingencies [Line Items]
Limited payment guarantee, percent of principle balance (up to)			30.00%
Construction loan amount			$ 121,700
One Uptown Venture \| Payment Guarantee
Loss Contingencies [Line Items]
Limited payment guarantee, percent of principle balance (up to)			15.00%
Construction loan amount			$ 85,000
Unconsolidated Real Estate Ventures
Loss Contingencies [Line Items]
Unconsolidated real estate venture debt at 100%, gross	1,384,000
Equity method investment, additional summarized financial information debt	$ 5,800

SEGMENT INFORMATION - Net Operating Income of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 129,372	$ 125,569	$ 384,481	$ 377,116
Operating expenses	(46,399)	(47,486)	(143,253)	(145,053)
Net operating income	82,973	78,083	241,228	232,063
Operating Segments \| Philadelphia CBD
Segment Reporting Information [Line Items]
Total revenue	56,367	56,105	169,265	165,002
Operating expenses	(18,609)	(20,080)	(59,452)	(60,361)
Net operating income	37,758	36,025	109,813	104,641
Operating Segments \| Pennsylvania Suburbs
Segment Reporting Information [Line Items]
Total revenue	32,611	32,709	97,484	95,849
Operating expenses	(9,770)	(11,022)	(29,633)	(31,438)
Net operating income	22,841	21,687	67,851	64,411
Operating Segments \| Austin, Texas
Segment Reporting Information [Line Items]
Total revenue	24,457	22,509	73,475	71,345
Operating expenses	(10,044)	(8,597)	(30,021)	(29,328)
Net operating income	14,413	13,912	43,454	42,017
Operating Segments \| Other
Segment Reporting Information [Line Items]
Total revenue	10,295	8,874	28,572	27,078
Operating expenses	(5,526)	(5,089)	(15,788)	(15,985)
Net operating income	4,769	3,785	12,784	11,093
Corporate
Segment Reporting Information [Line Items]
Total revenue	5,642	5,372	15,685	17,842
Operating expenses	(2,450)	(2,698)	(8,359)	(7,941)
Net operating income	$ 3,192	$ 2,674	$ 7,326	$ 9,901

BENEFICIARIES' EQUITY OF THE PARENT COMPANY (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Schedule of Earnings Per Share (EPS), Basic and Diluted


	Three Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(21,636)	$	(21,636)	$	13,478	$	13,478
Net (income) loss attributable to noncontrolling interests	82		82		(37)		(37)
Nonforfeitable dividends allocated to unvested restricted shareholders	(159)		(159)		(105)		(105)


Net income (loss) attributable to common shareholders	$	(21,713)	$	(21,713)	$	13,336	$	13,336
Denominator
Weighted-average shares outstanding	172,097,661		172,097,661		171,569,807		171,569,807
Contingent securities/Share based compensation	—		—		—		582,449
Weighted-average shares outstanding	172,097,661		172,097,661		171,569,807		172,152,256
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	(0.13)	$	(0.13)	$	0.08	$	0.08


	Nine Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(39,649)	$	(39,649)	$	24,230	$	24,230
Net (income) loss attributable to noncontrolling interests	140		140		(59)		(59)
Nonforfeitable dividends allocated to unvested restricted shareholders	(433)		(433)		(351)		(351)


Net income (loss) attributable to common shareholders	$	(39,942)	$	(39,942)	$	23,820	$	23,820
Denominator
Weighted-average shares outstanding	171,912,552		171,912,552		171,464,936		171,464,936
Contingent securities/Share based compensation	—		—		—		970,217
Weighted-average shares outstanding	171,912,552		171,912,552		171,464,936		172,435,153
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	(0.23)	$	(0.23)	$	0.14	$	0.14


	Three Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(21,636)	$	(21,636)	$	13,478	$	13,478
Net loss attributable to noncontrolling interests	20		20		1		1
Nonforfeitable dividends allocated to unvested restricted unitholders	(159)		(159)		(105)		(105)


Net income (loss) attributable to common unitholders	$	(21,775)	$	(21,775)	$	13,374	$	13,374
Denominator
Weighted-average units outstanding	172,614,128		172,614,128		172,086,274		172,086,274
Contingent securities/Share based compensation	—		—		—		582,449
Total weighted-average units outstanding	172,614,128		172,614,128		172,086,274		172,668,723
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	$	(0.13)	$	(0.13)	$	0.08	$	0.08


	Nine Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(39,649)	$	(39,649)	$	24,230	$	24,230
Net loss attributable to noncontrolling interests	21		21		5		5
Nonforfeitable dividends allocated to unvested restricted unitholders	(433)		(433)		(351)		(351)


Net income (loss) attributable to common unitholders	$	(40,061)	$	(40,061)	$	23,884	$	23,884
Denominator
Weighted-average units outstanding	172,429,019		172,429,019		172,019,701		172,019,701
Contingent securities/Share based compensation	—		—		—		970,217
Total weighted-average units outstanding	172,429,019		172,429,019		172,019,701		172,989,918
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	$	(0.23)	$	(0.23)	$	0.14	$	0.14

COVER PAGE - shares	9 Months Ended
COVER PAGE - shares	Sep. 30, 2023	Oct. 22, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
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 Arch Street
Entity Address, Address Line Two	Suite 1800
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		172,097,661
Entity Central Index Key	0000790816
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
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 Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001060386

PARTNERS' EQUITY OF THE PARENT COMPANY - Schedule of 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, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator
Net income (loss)	$ (21,636)	$ (12,737)	$ (5,276)	$ 13,478	$ 4,651	$ 6,101	$ (39,649)	$ 24,230
Nonforfeitable dividends allocated to unvested restricted unitholders, Basic	(159)			(105)			(433)	(351)
Nonforfeitable dividends allocated to unvested restricted unitholders, Diluted	$ (159)			$ (105)			$ (433)	$ (351)
Denominator
Weighted average units outstanding, basic (in shares)	172,097,661			171,569,807			171,912,552	171,464,936
Contingent securities/Share based compensation (in shares)	0			582,449			0	970,217
Weighted average shares outstanding, diluted (in shares)	172,097,661			172,152,256			171,912,552	172,435,153
Earnings (loss) per Common Partnership Unit:
Net income attributable to common shareholders, Basic (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14
Net income attributable to common shareholders, Diluted (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Numerator
Net income (loss)	$ (21,636)	$ (12,737)	$ (5,276)	$ 13,478	$ 4,651	$ 6,101	$ (39,649)	$ 24,230
Net loss attributable to noncontrolling interests	20			1			21	5
Nonforfeitable dividends allocated to unvested restricted unitholders, Basic	(159)			(105)			(433)	(351)
Nonforfeitable dividends allocated to unvested restricted unitholders, Diluted	(159)			(105)			(433)	(351)
Net income attributable to common unitholders, Basic	(21,775)			13,374			(40,061)	23,884
Net income attributable to common unitholders, Diluted	$ (21,775)			$ 13,374			$ (40,061)	$ 23,884
Denominator
Weighted average units outstanding, basic (in shares)	172,614,128			172,086,274			172,429,019	172,019,701
Contingent securities/Share based compensation (in shares)	0			582,449			0	970,217
Weighted average shares outstanding, diluted (in shares)	172,614,128			172,668,723			172,429,019	172,989,918
Earnings (loss) per Common Partnership Unit:
Net income attributable to common shareholders, Basic (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14
Net income attributable to common shareholders, Diluted (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14

SEGMENT INFORMATION - Reconciliation of Consolidated Net Income to Consolidated NOI (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting [Abstract]
Net income (loss)	$ (21,636)	$ (12,737)	$ (5,276)	$ 13,478	$ 4,651	$ 6,101	$ (39,649)	$ 24,230
Plus:
Interest expense	24,355			17,061			70,677	49,144
Interest expense - amortization of deferred financing costs	1,110			745			3,251	2,259
Depreciation and amortization	48,966			45,134			141,645	132,875
General and administrative expenses	8,069			7,564			26,911	25,892
Equity in loss of unconsolidated real estate ventures	10,739			6,260			24,504	15,804
Provision for impairment	11,666			0			16,134	0
Less:
Investment income	293			498			1,318	1,387
Income tax benefit (provision)	3			9			(35)	(66)
Net gain on disposition of real estate	0			8,669			0	8,813
Net gain on sale of undepreciated real estate	0			2,983			781	8,007
Net gain on real estate venture transactions	0			0			181	0
Consolidated net operating income	$ 82,973			$ 78,083			$ 241,228	$ 232,063

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Narrative (Details) $ in Thousands, ft² in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) ft² a property apartment	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) ft² a property apartment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of real estate properties	74		74
Accounts receivable \| $	$ 23,130		$ 23,130		$ 11,003
Real Estate Venture
Schedule of Equity Method Investments [Line Items]
Accounts receivable \| $	3,400		3,400		$ 2,900
Management Fees \| Real Estate Venture
Schedule of Equity Method Investments [Line Items]
Service and other revenue \| $	2,100	$ 2,200	6,200	$ 6,200
Leasing Commission Income \| Real Estate Venture
Schedule of Equity Method Investments [Line Items]
Service and other revenue \| $	1,500	$ 700	2,900	$ 2,600
Unconsolidated Real Estate Ventures
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated real estate ventures \| $	$ 593,000		$ 593,000
Unconsolidated Real Estate Ventures \| Minimum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	15.00%		15.00%
Unconsolidated Real Estate Ventures \| Maximum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	78.00%		78.00%
Unconsolidated Real Estate Ventures \| Office Properties
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures	5		5
Rentable area (in square feet) \| ft²	9.1		9.1
Unconsolidated Real Estate Ventures \| Other Liabilities
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated real estate ventures \| $	$ 45,100		$ 45,100
Unconsolidated Real Estate Ventures \| Unconsolidated Properties
Schedule of Equity Method Investments [Line Items]
Number of real estate properties	12		12
Number of properties with negative investment balances	1		1
Unconsolidated Real Estate Ventures \| Land Held For Development
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures	2		2
Area of land (in acres) \| a	1.4		1.4
Unconsolidated Real Estate Ventures \| Land Under Active Development
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures	4		4
Area of land (in acres) \| a	7.5		7.5
Unconsolidated Real Estate Ventures \| Mixed Use Tower
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated investments in Real Estate Ventures	1		1
Rentable area (in square feet) \| ft²	0.2		0.2
Number of apartment units (in units) \| apartment	250		250

REAL ESTATE INVESTMENTS - Schedule of Gross Carrying Value of Operating Properties (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long Lived Assets Held-for-sale [Line Items]
Total	$ 3,696,066	$ 3,617,240
Continuing Operations
Long Lived Assets Held-for-sale [Line Items]
Land	414,179	403,998
Building and improvements	2,783,304	2,760,357
Tenant improvements	$ 498,583	$ 452,885

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ (21,554)	$ 13,441	$ (39,509)	$ 24,171

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/exampleRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 27: http://www.xbrl.org/2003/role/disclosureRef
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
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Reference 29: http://www.xbrl.org/2003/role/disclosureRef
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Reference 36: http://www.xbrl.org/2003/role/disclosureRef
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Reference 37: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

DEBT OBLIGATIONS (Tables)

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Consolidated Debt Obligations

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding as of September 30, 2023 and December 31, 2022 (in thousands):


	September 30, 2023		December 31, 2022		Effective Interest Rate		Maturity Date
SECURED DEBT:



$245.0M 5.88% Secured Term Loan due 2028	$	245,000	—		5.88%		February 2028
$50.0M Construction Loan due 2026	—		—		SOFR + 2.50%		August 2026
Principal balance outstanding	245,000		—

Less: deferred financing costs	(3,346)		—
Total Secured indebtedness	$	241,654	$	—

UNSECURED DEBT
$600 million Unsecured Credit Facility	$	—	$	88,500	SOFR + 1.15%		June 2026	(a)
Term Loan - Swapped to fixed	250,000		250,000		SOFR + 1.30%		June 2027	(b)
$70.0 million Term Loan	70,000		—		SOFR + 1.85%		February 2024	(a)(c)
$350.0M 3.95% Guaranteed Notes due 2023	—		54,301		3.87%		February 2023	(d)
$350.0M 4.10% Guaranteed Notes due 2024	350,000		350,000		3.78%		October 2024
$450.0M 3.95% Guaranteed Notes due 2027	450,000		450,000		4.03%		November 2027
$350.0M 7.55% Guaranteed Notes due 2028	350,000		350,000		7.73%	(f)	March 2028
$350.0M 4.55% Guaranteed Notes due 2029	350,000		350,000		4.30%		October 2029
Indenture IA (Preferred Trust I)	27,062		27,062		SOFR + 1.51	(e)	March 2035
Indenture IB (Preferred Trust I)	25,774		25,774		SOFR + 1.51	(e)	April 2035
Indenture II (Preferred Trust II)	25,774		25,774		SOFR + 1.51	(e)	July 2035
Principal balance outstanding	1,898,610		1,971,411
Plus: original issue premium (discount), net	2,159		2,934
Less: deferred financing costs	(7,963)		(9,307)
Total unsecured indebtedness	$	1,892,806	$	1,965,038
Total Debt Obligations	$	2,134,460	$	1,965,038

(a)Spread includes a 10 basis point daily SOFR adjustment.

(b)On November 23, 2022, the $250.0 million unsecured term loan was swapped to a fixed rate of 5.01% and matures on June 30, 2027. The effective date of the swap was January 31, 2023.

(c)The maturity date of the $70.0 million unsecured term loan is subject to a 12 month optional extension upon customary terms and conditions.

Schedule of Maturities of Long-term Debt

As of September 30, 2023, the aggregate scheduled principal payments on the Company’s consolidated debt obligations (secured and unsecured) were as follows (in thousands):


2023 (three months remaining)	$	—
2024	350,000
2025	70,000
2026	—
2027	700,000
Thereafter	1,023,610
Total principal payments	2,143,610
Net unamortized premiums/(discounts)	2,159
Net deferred financing costs	(11,309)
Outstanding indebtedness	$	2,134,460

LEASES (Tables)

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Schedule of Lease Income

The table below sets forth the allocation of lease revenue between fixed contractual payments and variable lease payments for the three and nine months ended September 30, 2023 and 2022 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
Lease Revenue	2023		2022		2023		2022
Fixed contractual payments	$	94,478	$	90,632	$	279,129	$	268,067
Variable lease payments	23,851		24,078		72,754		73,643
Total	$	118,329	$	114,710	$	351,883	$	341,710

LEASES

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

LEASES

5. LEASES

Lessor Accounting


	Three Months Ended September 30,				Nine Months Ended September 30,
Lease Revenue	2023		2022		2023		2022
Fixed contractual payments	$	94,478	$	90,632	$	279,129	$	268,067
Variable lease payments	23,851		24,078		72,754		73,643
Total	$	118,329	$	114,710	$	351,883	$	341,710

FAIR VALUE OF FINANCIAL INSTRUMENTS

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

8. 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, 2023 and December 31, 2022, 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, 2023 and December 31, 2022 approximate the fair values for cash and cash equivalents, accounts receivable, other assets and liabilities, accounts payable and accrued expenses because they are short-term in duration. The following are financial instruments for which the Company’s estimates of fair value differ from the carrying amounts (in thousands):


	September 30, 2023				December 31, 2022
	Carrying Amount (a)		Fair Value		Carrying Amount (a)		Fair Value
Unsecured notes payable	$	1,495,914	$	1,314,195	$	1,549,760	$	1,411,351
Variable rate debt	$	396,892	$	355,102	$	415,278	$	386,988
Secured fixed rate debt	$	241,654	$	230,693	$	—	$	—

(a)Net of deferred financing costs of $6.2 million and $7.5 million for unsecured notes payable, $1.7 million and $1.8 million for variable rate debt and $3.3 million and $0.0 million for secured fixed rate debt as of September 30, 2023 and December 31, 2022.

The Company used quoted market prices as of September 30, 2023 and December 31, 2022 to value the unsecured notes payable and, as such, categorized them as Level 2.

The inputs utilized to determine the fair value of the Company’s 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 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, 2023 and December 31, 2022. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts were not comprehensively revalued for purposes of these financial statements since September 30, 2023. 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

DERIVATIVE FINANCIAL INSTRUMENTS (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Notional Amount	$ 250,000,000	$ 250,000,000
Swap \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional Amount	$ 250,000,000	250,000,000
Strike	3.729%
Asset, fair value	$ 6,065,000	$ 255,000

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ (39,649)	$ 24,230
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	141,645	132,875
Amortization of deferred financing costs	3,251	2,259
Amortization of debt discount/(premium), net	(774)	(1,463)
Amortization of stock compensation costs	8,305	7,232
Straight-line rent income	(6,612)	(8,958)
Amortization of acquired above (below) market leases, net	(993)	(2,189)
Ground rent expense	601	611
Net gain on real estate venture transactions	(181)	0
Total gain on sale of real estate	(781)	(16,820)
Provision for impairment	16,134	0
Loss from unconsolidated real estate ventures, including income distributions	24,504	15,049
Income tax provision	35	66
Changes in assets and liabilities:
Accounts receivable	(2,362)	933
Other assets	(24,619)	(9,949)
Accounts payable and accrued expenses	(8,992)	3,240
Deferred income, gains and rent	(1,196)	(666)
Other liabilities	3,089	1,712
Net cash provided by operating activities	111,405	148,162
Cash flows from investing activities:
Acquisition of properties	0	(3,446)
Proceeds from the sale of properties	51,285	35,462
Capital expenditures for tenant improvements	(34,219)	(67,782)
Capital expenditures for redevelopments	(42,592)	(74,383)
Capital expenditures for developments	(30,149)	(82,507)
Advances for the purchase of tenant assets, net of repayments	(9,292)	(447)
Investment in unconsolidated real estate ventures	(72,715)	(43,681)
Deposits for real estate	3,500	(7,450)
Capital distributions from unconsolidated real estate ventures	2,700	8,930
Leasing costs paid	(7,969)	(20,096)
Net cash used in investing activities	(139,451)	(255,400)
Cash flows from financing activities:
Proceeds from credit facility borrowings	172,000	260,000
Repayments of credit facility borrowings	(260,500)	(37,000)
Repayments of unsecured notes	(54,301)	0
Proceeds from unsecured term loan	70,000	0
Proceeds from secured term loan	245,000	0
Debt financing costs paid	(4,371)	(6,641)
Shares used for employee taxes upon vesting of share awards	(952)	(2,941)
Redemption of limited partnership units	0	(4,006)
Distributions paid to shareholders	(98,306)	(98,020)
Distributions to noncontrolling interest	(294)	(353)
Net cash provided by financing activities	68,276	111,039
Increase in cash and cash equivalents and restricted cash	40,230	3,801
Cash and cash equivalents and restricted cash at beginning of period	18,387	28,300
Cash and cash equivalents and restricted cash at end of period	58,617	32,101
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents, beginning of period	17,551	27,463
Restricted cash, beginning of period	836	837
Cash and cash equivalents and restricted cash at beginning of period	18,387	28,300
Cash and cash equivalents, end of period	47,872	31,198
Restricted cash, end of period	10,745	903
Cash and cash equivalents and restricted cash at end of period	58,617	32,101
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the nine months ended September 30, 2023 and 2022 of $12,602 and $7,274, respectively	73,217	47,711
Cash paid for income taxes	550	902
Supplemental disclosure of non-cash activity:
Dividends and distributions declared but not paid	26,027	32,805
Change in investment in real estate ventures as a result of deconsolidation	8,595	107,057
Change in operating real estate from deconsolidation of operating properties	(7,814)	(105,405)
Change in other assets as a result of deconsolidation of operating properties	0	(1,652)
Change in other assets as a result of investing activities	0	13,396
Change in capital expenditures financed through accounts payable at period end	4,276	(11,020)
Change in capital expenditures financed through retention payable at period end	$ 2,587	$ (4,609)

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Net property	$ 2,808,540			$ 2,904,788
Other assets	102,557			78,667
Other liabilities	60,010			52,331
Debt, net	2,134,460			1,965,038
Equity	1,514,368	$ 1,556,660	$ 1,593,218	1,633,334	$ 1,634,949	$ 1,651,563	$ 1,675,863	$ 1,701,219
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Net property	2,317,405			2,117,226
Other assets	533,540			506,213
Other liabilities	444,052			446,101
Debt, net	1,378,347			1,198,213
Equity	$ 1,028,546			$ 979,125

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

- Definition

Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

+ References

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+ Details

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

INTANGIBLE ASSETS AND LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Liabilities

As of September 30, 2023 and December 31, 2022, the Company’s intangible assets/liabilities were comprised of the following (in thousands):


	September 30, 2023
	Total Cost		Accumulated Amortization		Intangible Assets, net
Intangible assets, net:
In-place lease value	$	27,003	$	(18,553)	$	8,450
Tenant relationship value	110		(51)		59
Above market leases acquired	178		(148)		30


Total intangible assets, net	$	27,291	$	(18,752)	$	8,539

	Total Cost		Accumulated Amortization		Intangible Liabilities, net
Intangible liabilities, net:
Below market leases acquired	$	17,783	$	(9,247)	$	8,536


	December 31, 2022
	Total Cost		Accumulated Amortization		Intangible Assets, net
Intangible assets, net:
In-place lease value	$	55,715	$	(37,437)	$	18,278
Tenant relationship value	167		(104)		63
Above market leases acquired	331		(221)		110


Total intangible assets, net	$	56,213	$	(37,762)	$	18,451

	Total Cost		Accumulated Amortization		Intangible Liabilities, net
Intangible liabilities, net:
Below market leases acquired	$	20,985	$	(10,663)	$	10,322

Schedule of Amortization for Intangible Assets and Liabilities

As of September 30, 2023, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands):


	Assets		Liabilities
2023 (three months remaining)	$	845	$	266
2024	1,818		929
2025	1,485		869
2026	1,093		739
2027	808		623
Thereafter	2,490		5,110


Total	$	8,539	$	8,536

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	14. 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. 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. Debt Guarantees and Equity Funding Commitments As of September 30, 2023, the Company’s unconsolidated real estate ventures had aggregate indebtedness of $1,384.0 million. These loans are generally mortgage loans or secured construction loans, most of which are nonrecourse to the Company, except for customary recourse carve-outs. In addition, during construction undertaken by the unconsolidated real estate ventures, including the 3025 JFK Venture, the 3151 Market Street Venture, and the One Uptown Ventures, the Company has provided, and expects to continue to provide, cost overrun and completion guarantees, as well as customary environmental indemnities and guarantees of customary exceptions to nonrecourse provisions in loan agreements. In the agreement with its partner in the 3025 JFK Venture, the Company agreed to provide cost overrun and completion guarantees for the project under development. With respect to the construction loan obtained by 3025 JFK Venture on July 23, 2021, the Company has also provided a carry guarantee and limited payment guarantee up to 25% of the principal balance of the $186.7 million construction loan. The Company expects that it will be required to fund $5.8 million of additional equity through the project completion date. In the agreement with its partner in the 3151 Market Street Venture, the Company agreed to provide cost overrun and completion guaranties for the project under development. As of September 30, 2023, total estimated costs to develop 3151 Market Street are approximately $316.9 million and as of such date, the Company has fully funded its share of equity. The partner is responsible for up to $22.9 million of additional construction costs. Thereafter, if a construction loan has not been obtained, the Company would be responsible to fund the balance of the development costs and would fund such costs through the use of its credit facilities and cash on hand. With respect to the One Uptown Ventures, the Company has provided completion guarantees and environmental indemnities in favor of its partner. In addition, the Company has provided to completion guarantees, environmental indemnities and guarantees of exceptions to nonrecourse loan provisions in favor of the lenders for the One Uptown Venture. Moreover, the Company has provided, in favor of the lenders, carry guarantees and limited payment guarantees up to 30% and 15% of the principal balance of the $121.7 million (office) and $85.0 million (multifamily) construction loans, respectively. The Company expects that it will be required to fund $4.0 million of additional equity for the office component of the project through the project completion date. Impact of Natural Disasters and Casualty The Company carries liability insurance to mitigate its exposure to certain losses, including those relating to property damage. The Company records the estimated amount of expected insurance proceeds for property damage and other losses incurred as an asset (typically a receivable from the insurer) and income up to the amount of the losses incurred when receipt of insurance proceeds is deemed probable. Any amount of insurance recovery in excess of the amount of the losses is considered a gain contingency and is not recorded until the proceeds are received. Other Commitments or Contingencies In connection with the Schuylkill Yards Project, the Company entered into a neighborhood engagement program and, as of September 30, 2023, had $6.6 million of future fixed contractual obligations. The Company also committed to fund additional contributions under the program. As of September 30, 2023, the Company estimates that these additional contributions, which are not fixed under the terms of agreement, will be $2.2 million. 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.

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Summary of Results of Operations of Real Estate Ventures with Interests (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
Revenue	$ 129,372			$ 125,569			$ 384,481	$ 377,116
Operating expenses	(115,100)			(100,184)			(327,943)	(303,820)
Interest expense, net	(24,355)			(17,061)			(70,677)	(49,144)
Depreciation and amortization	(48,966)			(45,134)			(141,645)	(132,875)
Net income (loss)	(21,636)	$ (12,737)	$ (5,276)	13,478	$ 4,651	$ 6,101	(39,649)	24,230
Equity in loss of unconsolidated real estate ventures	(10,739)			(6,260)			(24,504)	(15,804)
Investment In Nonconsolidated Real Estate
Schedule of Equity Method Investments [Line Items]
Revenue	58,986			63,800			175,939	181,973
Operating expenses	(31,641)			(32,735)			(90,531)	(92,998)
Interest expense, net	(21,591)			(14,012)			(55,769)	(33,144)
Depreciation and amortization	(24,635)			(28,064)			(73,636)	(77,274)
Net income (loss)	(18,881)			(11,011)			(43,997)	(21,443)
Company's share of net loss	(10,130)			(6,092)			(23,782)	(15,531)
Basis adjustments and other	$ (609)			$ (168)			$ (722)	$ (273)

DERIVATIVE FINANCIAL INSTRUMENTS

9 Months Ended

Sep. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

9. DERIVATIVE FINANCIAL INSTRUMENTS

The following table summarizes the terms and fair values of the Company’s derivative financial instruments as of September 30, 2023 and December 31, 2022. 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).


Hedge Product	Hedge Type	Designation		Notional Amount				Strike		Trade Date	Maturity Date	Fair value
				9/30/2023		12/31/2022						9/30/2023		12/31/2022



Assets/(Liabilities)
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000	3.729	%	November 23, 2022	June 30, 2027	$	6,065	$	255
				$	250,000	$	250,000

(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.

BASIS OF PRESENTATION	9 Months Ended
BASIS OF PRESENTATION	Sep. 30, 2023
Accounting Policies [Abstract]
BASIS OF PRESENTATION	2. 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 (“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, 2023, the results of its operations for the three and nine months ended September 30, 2023 and 2022 and its cash flows for the nine months ended September 30, 2023 and 2022. 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 Annual Report on Form 10-K for the year ended December 31, 2022 filed with the SEC on February 21, 2023. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements as of that date but does not include all the information and footnotes required by GAAP for complete financial statements.The Company’s Annual Report on Form 10-K for the year ended December 31, 2022 contains a discussion of the Company’s significant accounting policies under Note 2, “Summary of Significant Accounting Policies”. There have been no material changes in the Company’s significant accounting policies since December 31, 2022. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The estimates and assumptions include, but are not limited to, common development cost estimates for the Company’s contributions to development joint ventures. The common development cost estimates for development joint venture contributions are highly judgmental, covering significant future time horizons and are sensitive to cost escalation, sales price escalation and absorption, which are affected by expectations about future market or economic conditions. Actual results could differ from these and other estimates.

REAL ESTATE INVESTMENTS

9 Months Ended

Sep. 30, 2023

Real Estate [Abstract]

REAL ESTATE INVESTMENTS

3. REAL ESTATE INVESTMENTS

As of September 30, 2023 and December 31, 2022, the gross carrying value of the operating properties was as follows (in thousands):


	September 30, 2023		December 31, 2022
Land	$	414,179	$	403,998
Building and improvements	2,783,304		2,760,357
Tenant improvements	498,583		452,885


Total	$	3,696,066	$	3,617,240

Dispositions

During the three months ended March 31, 2023, the Company deconsolidated $7.8 million recorded in “Prepaid leasehold interests in land held for development, net” on the consolidated balance sheets. This deconsolidation reflects the Company’s contribution, in January 2023, of 200,000 square feet of buildable floor to area ratio (“FAR”) to the Company’s unconsolidated real estate venture, for use by this unconsolidated real estate venture in the development of 3151 Market Street, a life science project located in Philadelphia. Upon contribution at fair market value, we recognized a gain, net of transaction costs, of $0.8 million in “Net gain on sale of undepreciated real estate” on the consolidated statements of operations.

During the three months ended September 30, 2023, the Company sold Three Barton Skyway, a 173,302 square foot office building located in Austin, TX for $53.3 million. As of June 30, 2023, the property was classified as held for sale and a $4.5 million impairment loss, inclusive of costs to sell, was recognized. There were no gains or additional losses recognized in connection with the sale during the three months ended September 30, 2023.

Impairment

For the quarter ended September 30, 2023, the Company recognized impairment losses totaling $11.7 million on properties located in the Pennsylvania Suburbs segment. The estimated fair value is considered Level 3 in accordance with ASC 820 and was based upon an executed purchase and sale agreement as of September 30, 2023. The Company is in active negotiations with the potential buyer and there can be no assurance that the Company will complete the disposition.

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - MAP, 3025 JFK Ventures and One Uptown - Office (Details)		3 Months Ended	9 Months Ended
	Sep. 29, 2023 USD ($)	Sep. 30, 2023 USD ($) ft² property extension	Sep. 30, 2023 USD ($) ft² property extension	Sep. 30, 2022 USD ($)	Dec. 31, 2023 USD ($)	Sep. 28, 2023	Sep. 18, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Negative investment in real estate ventures		$ (592,948,000)	$ (592,948,000)						$ (532,224,000)
Derivative, notional amount		$ 250,000,000	250,000,000						$ 250,000,000
Payments to acquire investment			$ 72,715,000	$ 43,681,000
3025 JFK Venture
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		58.00%	58.00%					55.00%
Payments to acquire investment		$ 6,700,000
3025 JFK Venture \| Interest Rate Cap
Schedule of Equity Method Investments [Line Items]
Derivative, notional amount							$ 148,000,000
Debt instrument, interest rate, stated percentage							3.00%
Debt instrument, maximum interest rate		6.60%	6.60%
3025 JFK Venture \| Interest Rate Cap \| Forecast
Schedule of Equity Method Investments [Line Items]
Derivative, notional amount					$ 187,000,000
3025 JFK Venture \| Interest Rate Cap \| Secured Overnight Financing Rate (SOFR)
Schedule of Equity Method Investments [Line Items]
Debt instrument, interest rate, stated percentage		3.60%	3.60%
One Uptown Office
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	54.00%					50.00%
Payments to acquire investment	$ 2,100,000
Investment in unconsolidated real estate ventures	$ 41,800,000
Variable Interest Entity, Not Primary Beneficiary \| MAP Venture
Schedule of Equity Method Investments [Line Items]
Number of office properties owned \| property		58	58
Rentable area (in square feet) \| ft²		3,924,783	3,924,783
Negative investment in real estate ventures								$ 45,100,000
Variable Interest Entity, Not Primary Beneficiary \| MAP Venture \| Secured fixed rate debt
Schedule of Equity Method Investments [Line Items]
Number of extensions \| extension		2	2
Extension period			2 months
Capitalized financing costs		$ 180,400,000	$ 180,400,000

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Cash Flows [Abstract]
Capitalized interest	$ 12,602	$ 7,274

FAIR VALUE OF FINANCIAL INSTRUMENTS - Financial Instruments for which Estimates of Fair Value Differ from Carrying Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Secured fixed rate debt	$ 241,654	$ 0
Deferred financing costs, net	11,309
Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net	7,963	9,307
Secured fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred financing costs, net	3,346	0
Carrying Amount \| Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured notes payable	1,495,914	1,549,760
Deferred financing costs, net	6,200	7,500
Carrying Amount \| Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate debt	396,892	415,278
Deferred financing costs, net	1,700	1,800
Carrying Amount \| Secured fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Secured fixed rate debt	241,654	0
Deferred financing costs, net	3,300	0
Fair Value \| Unsecured notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	1,314,195	1,411,351
Fair Value \| Variable rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	355,102	386,988
Fair Value \| Secured fixed rate debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value	$ 230,693	$ 0

CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
BRANDYWINE OPERATING PARTNERSHIP, L.P. \| General Partner Capital
Distributions to general partnership unitholders (in dollars per share)	$ 0.15	$ 0.19	$ 0.19	$ 0.19	$ 0.19	$ 0.19

PARTNERS' EQUITY OF THE PARENT COMPANY - Narrative (Details) $ / shares in Units, $ in Millions			3 Months Ended
	Sep. 20, 2023 USD ($) $ / shares	Jan. 03, 2019	Sep. 30, 2023 $ / shares	Jun. 30, 2023 $ / shares	Mar. 31, 2023 $ / shares	Sep. 30, 2022 $ / shares	Jun. 30, 2022 $ / shares	Mar. 31, 2022 $ / shares
Earnings Per Common Partnership Unit [Line Items]
Distributions declared (in dollars per share) \| $ / shares	$ 0.15		$ 0.15	$ 0.19	$ 0.19	$ 0.19	$ 0.19	$ 0.19
Dividends, common stock \| $	$ 26.0
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Earnings Per Common Partnership Unit [Line Items]
Distributions declared (in dollars per share) \| $ / shares	$ 0.15
Dividends, common stock \| $	$ 26.0
Repurchase program, ratio of mirror unit of operating partnership retired for each common share repurchased		1

ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP

1. ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP

Brandywine Realty Trust (the “Parent Company”) is a self-administered and self-managed real estate investment trust (“REIT”) engaged in the acquisition, development, redevelopment, ownership, management, and operation of a portfolio of office and mixed-use properties. The Parent Company owns its assets and conducts its operations through Brandywine Operating Partnership, L.P. (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, 2023, owned a 99.7% interest in the Operating Partnership. The Parent Company’s common shares of beneficial interest (“common shares”) are publicly traded on the New York Stock Exchange under the ticker symbol “BDN.” The Parent Company, the Operating Partnership, and their consolidated subsidiaries are collectively referred to as the “Company.”

As of September 30, 2023, the Company owned 74 properties that contained an aggregate of approximately 13.2 million net rentable square feet (collectively, the “Properties”). The Company’s core portfolio of operating properties (the “Core Properties”) excludes development properties, redevelopment properties, and properties held for sale. The Properties were comprised of the following as of September 30, 2023:


	Number of Properties	Rentable Square Feet
Office properties	65	11,656,197
Mixed-use properties	5	942,334

Core Properties	70	12,598,531
Development property	1	144,685
Redevelopment properties	2	268,365
Recently completed - not stabilized property	1	168,294

The Properties	74	13,179,875

In addition to the Properties, as of September 30, 2023, the Company owned 152.1 acres of land held for development. The Company also held a leasehold interest in one land parcel totaling 0.8 acres, acquired through a prepaid 99-year ground lease, and held options to purchase approximately 55.1 additional acres of undeveloped land. As of September 30, 2023, 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 12.7 million net rentable square feet.

As of September 30, 2023, the Company also owned economic interests in twelve unconsolidated real estate ventures (see Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information). The Properties and the properties owned by the unconsolidated real estate ventures are primarily located in or near Philadelphia, Pennsylvania; Austin, Texas; Metropolitan Washington, D.C.; 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, 2023, the management company subsidiaries were managing properties containing an aggregate of approximately 22.7 million net rentable square feet, of which approximately 13.2 million net rentable square feet related to Properties owned by the Company and approximately 9.5 million net rentable square feet related to properties owned by third parties and unconsolidated real estate ventures.

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

BENEFICIARIES' EQUITY OF THE PARENT COMPANY

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

BENEFICIARIES' EQUITY OF THE PARENT COMPANY

11. BENEFICIARIES’ EQUITY OF THE PARENT COMPANY

Earnings per Share (EPS)


	Three Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(21,636)	$	(21,636)	$	13,478	$	13,478
Net (income) loss attributable to noncontrolling interests	82		82		(37)		(37)
Nonforfeitable dividends allocated to unvested restricted shareholders	(159)		(159)		(105)		(105)


Net income (loss) attributable to common shareholders	$	(21,713)	$	(21,713)	$	13,336	$	13,336
Denominator
Weighted-average shares outstanding	172,097,661		172,097,661		171,569,807		171,569,807
Contingent securities/Share based compensation	—		—		—		582,449
Weighted-average shares outstanding	172,097,661		172,097,661		171,569,807		172,152,256
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	(0.13)	$	(0.13)	$	0.08	$	0.08


	Nine Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(39,649)	$	(39,649)	$	24,230	$	24,230
Net (income) loss attributable to noncontrolling interests	140		140		(59)		(59)
Nonforfeitable dividends allocated to unvested restricted shareholders	(433)		(433)		(351)		(351)


Net income (loss) attributable to common shareholders	$	(39,942)	$	(39,942)	$	23,820	$	23,820
Denominator
Weighted-average shares outstanding	171,912,552		171,912,552		171,464,936		171,464,936
Contingent securities/Share based compensation	—		—		—		970,217
Weighted-average shares outstanding	171,912,552		171,912,552		171,464,936		172,435,153
Earnings (loss) per Common Share:
Net income (loss) attributable to common shareholders	$	(0.23)	$	(0.23)	$	0.14	$	0.14

Redeemable common limited partnership units totaling 516,467 at September 30, 2023 and September 30, 2022, 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, 2023 and 2022, 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 equity incentive plan.

Common Shares

On September 20, 2023, the Parent Company declared a distribution of $0.15 per common share, totaling $26.0 million, which was paid on October 18, 2023 to shareholders of record as of October 4, 2023.

The Parent Company maintains a common share repurchase program under which the Board of Trustees has authorized the Parent Company to repurchase its common shares. On January 3, 2019, the Board of Trustees authorized the repurchase of up to $150.0 million of the Company's common shares from and after January 3, 2019. During the nine months ended September 30, 2023 and September 30, 2022, the Company did not repurchase any common shares.

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Commerce Square Venture (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 02, 2023
Schedule of Equity Method Investments [Line Items]
Payments to acquire investment	$ 72,715,000	$ 43,681,000
Secured fixed rate debt \| Common Ownership Interest Securities
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount			$ 220,000,000
Commerce Square Venture
Schedule of Equity Method Investments [Line Items]
Payments to acquire investment	$ 46,500,000
Commerce Square Venture \| Common Ownership Interest Securities
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	8.00%
Commerce Square Venture \| Secured fixed rate debt
Schedule of Equity Method Investments [Line Items]
Debt instrument, interest rate, stated percentage			7.79%

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - BRANDYWINE OPERATING PARTNERSHIP, L.P. - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2023

Sep. 30, 2022

Sep. 30, 2023

Sep. 30, 2022

Net income (loss)

$ (21,636)

$ 13,478

$ (39,649)

$ 24,230

Comprehensive income:

Unrealized gain on derivative financial instruments

2,885

490

4,240

6,001

Amortization of interest rate contracts

^[1]

188

564

Total comprehensive income

2,885

678

4,240

6,565

Comprehensive income (loss)

(18,751)

14,156

(35,409)

30,795

Comprehensive loss attributable to noncontrolling interest - consolidated real estate ventures

106

(39)

128

(79)

Comprehensive income (loss) attributable to Brandywine Realty Trust

(18,645)

14,117

(35,281)

30,716

BRANDYWINE OPERATING PARTNERSHIP, L.P.

Net income (loss)

(21,636)

13,478

(39,649)

24,230

Comprehensive income:

Unrealized gain on derivative financial instruments

2,885

490

4,240

6,001

Amortization of interest rate contracts

^[2]

188

564

Total comprehensive income

2,885

678

4,240

6,565

Comprehensive income (loss)

(18,751)

14,156

(35,409)

30,795

Comprehensive loss attributable to noncontrolling interest - consolidated real estate ventures

Comprehensive income (loss) attributable to Brandywine Realty Trust

$ (18,731)

$ 14,157

$ (35,388)

$ 30,800

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

- Definition

+ References + Details

- Definition

+ References + Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

+ Details

- Definition

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

+ References

+ Details

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Real estate investments:
Operating properties	$ 3,694,633	$ 3,617,240
Accumulated depreciation	(1,153,030)	(1,063,060)
Right of use asset - operating leases, net	19,188	19,664
Operating real estate investments, net	2,560,791	2,573,844
Construction-in-progress	143,929	218,869
Land held for development	76,058	76,499
Prepaid leasehold interests in land held for development, net	27,762	35,576
Total real estate investments, net	2,808,540	2,904,788
Cash and cash equivalents	47,872	17,551
Restricted cash and escrows	10,745	0
Accounts receivable	23,130	11,003
Accrued rent receivable, net of allowance of $3,158 and $3,947 as of September 30, 2023 and December 31, 2022, respectively	185,135	179,771
Investment in unconsolidated real estate ventures	638,096	567,635
Deferred costs, net	98,049	96,639
Intangible assets, net	8,539	18,451
Other assets	102,557	78,667
Total assets	3,922,663	3,874,505
LIABILITIES AND BENEFICIARIES' EQUITY
Secured term loan, net	241,654	0
Unsecured credit facility	0	88,500
Unsecured term loan, net	318,282	248,168
Unsecured senior notes, net	1,574,524	1,628,370
Accounts payable and accrued expenses	132,731	132,440
Distributions payable	26,018	32,792
Deferred income, gains and rent	23,222	25,082
Intangible liabilities, net	8,536	10,322
Lease liability - operating leases	23,318	23,166
Other liabilities	60,010	52,331
Total liabilities	2,408,295	2,241,171
Commitments and contingencies (See Note 14)
Brandywine Realty Trust's Equity:
Common Shares of Brandywine Realty Trust's beneficial interest, $0.01 par value; shares authorized 400,000,000; 172,097,661 and 171,569,807 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	1,719	1,716
Additional paid-in-capital	3,161,568	3,153,229
Deferred compensation payable in common shares	19,965	19,601
Common shares in grantor trust, 1,194,127 and 1,179,643 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	(19,965)	(19,601)
Cumulative earnings	1,136,686	1,176,195
Accumulated other comprehensive income	8,125	3,897
Cumulative distributions	(2,801,074)	(2,709,405)
Total Brandywine Realty Trust's equity	1,507,024	1,625,632
Noncontrolling interests	7,344	7,702
Total beneficiaries' equity	1,514,368	1,633,334
Total liabilities and beneficiaries' equity	$ 3,922,663	$ 3,874,505

INTANGIBLE ASSETS AND LIABILITIES

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS AND LIABILITIES

6. INTANGIBLE ASSETS AND LIABILITIES

As of September 30, 2023 and December 31, 2022, the Company’s intangible assets/liabilities were comprised of the following (in thousands):


	September 30, 2023
	Total Cost		Accumulated Amortization		Intangible Assets, net
Intangible assets, net:
In-place lease value	$	27,003	$	(18,553)	$	8,450
Tenant relationship value	110		(51)		59
Above market leases acquired	178		(148)		30


Total intangible assets, net	$	27,291	$	(18,752)	$	8,539

	Total Cost		Accumulated Amortization		Intangible Liabilities, net
Intangible liabilities, net:
Below market leases acquired	$	17,783	$	(9,247)	$	8,536


	December 31, 2022
	Total Cost		Accumulated Amortization		Intangible Assets, net
Intangible assets, net:
In-place lease value	$	55,715	$	(37,437)	$	18,278
Tenant relationship value	167		(104)		63
Above market leases acquired	331		(221)		110


Total intangible assets, net	$	56,213	$	(37,762)	$	18,451

	Total Cost		Accumulated Amortization		Intangible Liabilities, net
Intangible liabilities, net:
Below market leases acquired	$	20,985	$	(10,663)	$	10,322

As of September 30, 2023, the Company’s annual amortization for its intangible assets/liabilities, assuming no prospective early lease terminations, was as follows (dollars in thousands):


	Assets		Liabilities
2023 (three months remaining)	$	845	$	266
2024	1,818		929
2025	1,485		869
2026	1,093		739
2027	808		623
Thereafter	2,490		5,110


Total	$	8,539	$	8,536

ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP (Tables)

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

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

The Company’s core portfolio of operating properties (the “Core Properties”) excludes development properties, redevelopment properties, and properties held for sale. The Properties were comprised of the following as of September 30, 2023:


	Number of Properties	Rentable Square Feet
Office properties	65	11,656,197
Mixed-use properties	5	942,334

Core Properties	70	12,598,531
Development property	1	144,685
Redevelopment properties	2	268,365
Recently completed - not stabilized property	1	168,294

The Properties	74	13,179,875

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES (Tables)

9 Months Ended

Sep. 30, 2023

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Financial Position of Real Estate Ventures

The following is a summary of the financial position of the unconsolidated real estate ventures in which the Company held interests as of September 30, 2023 and December 31, 2022 (in thousands):


	September 30, 2023		December 31, 2022
Net property	$	2,317,405	$	2,117,226
Other assets	533,540		506,213
Other liabilities	444,052		446,101
Debt, net	1,378,347		1,198,213
Equity (a)	1,028,546		979,125

(a)This amount does not include 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.

Schedule of Results Of Unconsolidated Real Estate Ventures

The following is a summary of results of operations of the unconsolidated real estate ventures in which the Company held interests during the three and nine-month periods ended September 30, 2023 and 2022 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Revenue	$	58,986	$	63,800	$	175,939	$	181,973
Operating expenses	(31,641)		(32,735)		(90,531)		(92,998)
Interest expense, net	(21,591)		(14,012)		(55,769)		(33,144)
Depreciation and amortization	(24,635)		(28,064)		(73,636)		(77,274)


Net loss	$	(18,881)	$	(11,011)	$	(43,997)	$	(21,443)
Ownership interest %	Various		Various		Various		Various
Company's share of net loss	$	(10,130)	$	(6,092)	$	(23,782)	$	(15,531)

Basis adjustments and other	(609)		(168)		(722)		(273)
Equity in loss of unconsolidated real estate ventures	$	(10,739)	$	(6,260)	$	(24,504)	$	(15,804)

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2023

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, 2023				December 31, 2022
	Carrying Amount (a)		Fair Value		Carrying Amount (a)		Fair Value
Unsecured notes payable	$	1,495,914	$	1,314,195	$	1,549,760	$	1,411,351
Variable rate debt	$	396,892	$	355,102	$	415,278	$	386,988
Secured fixed rate debt	$	241,654	$	230,693	$	—	$	—

CONSOLIDATED BALANCE SHEETS - BRANDYWINE OPERATING PARTNERSHIP, L.P. - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Real estate investments:
Operating properties	$ 3,694,633	$ 3,617,240
Accumulated depreciation	(1,153,030)	(1,063,060)
Right of use asset - operating leases, net	19,188	19,664
Operating real estate investments, net	2,560,791	2,573,844
Construction-in-progress	143,929	218,869
Land held for development	76,058	76,499
Prepaid leasehold interests in land held for development, net	27,762	35,576
Total real estate investments, net	2,808,540	2,904,788
Cash and cash equivalents	47,872	17,551
Restricted cash and escrows	10,745	0
Accounts receivable	23,130	11,003
Accrued rent receivable, net of allowance of $3,158 and $3,947 as of September 30, 2023 and December 31, 2022, respectively	185,135	179,771
Investment in unconsolidated real estate ventures	638,096	567,635
Deferred costs, net	98,049	96,639
Intangible assets, net	8,539	18,451
Other assets	102,557	78,667
Total assets	3,922,663	3,874,505
LIABILITIES AND PARTNERS' EQUITY
Mortgage notes payable, net	241,654	0
Unsecured credit facility	0	88,500
Unsecured term loan, net	318,282	248,168
Unsecured senior notes, net	1,574,524	1,628,370
Accounts payable and accrued expenses	132,731	132,440
Distributions payable	26,018	32,792
Deferred income, gains and rent	23,222	25,082
Intangible liabilities, net	8,536	10,322
Lease liability - operating leases	23,318	23,166
Other liabilities	60,010	52,331
Total liabilities	2,408,295	2,241,171
Commitments and contingencies (See Note 14)
Brandywine Operating Partnership, L.P.'s equity:
Accumulated other comprehensive income	8,125	3,897
Total liabilities and beneficiaries' equity	3,922,663	3,874,505
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Real estate investments:
Operating properties	3,694,633	3,617,240
Accumulated depreciation	(1,153,030)	(1,063,060)
Right of use asset - operating leases, net	19,188	19,664
Operating real estate investments, net	2,560,791	2,573,844
Construction-in-progress	143,929	218,869
Land held for development	76,058	76,499
Prepaid leasehold interests in land held for development, net	27,762	35,576
Total real estate investments, net	2,808,540	2,904,788
Cash and cash equivalents	47,872	17,551
Restricted cash and escrows	10,745	0
Accounts receivable	23,130	11,003
Accrued rent receivable, net of allowance of $3,158 and $3,947 as of September 30, 2023 and December 31, 2022, respectively	185,135	179,771
Investment in unconsolidated real estate ventures	638,096	567,635
Deferred costs, net	98,049	96,639
Intangible assets, net	8,539	18,451
Other assets	102,557	78,667
Total assets	3,922,663	3,874,505
LIABILITIES AND PARTNERS' EQUITY
Mortgage notes payable, net	241,654	0
Unsecured credit facility	0	88,500
Unsecured term loan, net	318,282	248,168
Unsecured senior notes, net	1,574,524	1,628,370
Accounts payable and accrued expenses	132,731	132,440
Distributions payable	26,018	32,792
Deferred income, gains and rent	23,222	25,082
Intangible liabilities, net	8,536	10,322
Lease liability - operating leases	23,318	23,166
Other liabilities	60,010	52,331
Total liabilities	2,408,295	2,241,171
Commitments and contingencies (See Note 14)
Redeemable limited partnership units at redemption value; 516,467 and 516,467 issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	2,282	3,195
Brandywine Operating Partnership, L.P.'s equity:
General Partnership Capital; $172,097,661 and 171,569,807 units issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	1,501,466	1,623,738
Accumulated other comprehensive income	7,809	3,569
Total Brandywine Operating Partnership, L.P.'s equity	1,509,275	1,627,307
Noncontrolling interest - consolidated real estate ventures	2,811	2,832
Total partners' equity	1,512,086	1,630,139
Total liabilities and beneficiaries' equity	$ 3,922,663	$ 3,874,505

CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY - USD ($) $ in Thousands	Total	Accumulated Other Comprehensive Income	Noncontrolling Interest - Consolidated Real Estate Ventures	BRANDYWINE OPERATING PARTNERSHIP, L.P.	BRANDYWINE OPERATING PARTNERSHIP, L.P. Accumulated Other Comprehensive Income	BRANDYWINE OPERATING PARTNERSHIP, L.P. Noncontrolling Interest - Consolidated Real Estate Ventures	BRANDYWINE OPERATING PARTNERSHIP, L.P. General Partner Capital
Beginning balance (in shares) at Dec. 31, 2021							171,126,257
Beginning balance at Dec. 31, 2021				$ 1,690,079	$ (2,366)	$ 2,834	$ 1,689,611
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	$ 6,101		$ 8	6,101		(2)	$ 6,103
Other comprehensive (loss) income	3,952	$ 3,940	12	3,952	3,952
Deferred compensation obligation (in shares)							(19,406)
Deferred compensation obligation	(249)			(249)			$ (249)
Repurchase and retirement of LP units				(4,006)			$ (4,006)
Share-based compensation activity (in shares)							277,061
Share-based compensation activity	1,655			1,655			$ 1,655
Adjustment of redeemable partnership units to liquidation value at period end				3,704			3,704
Distributions declared to general partnership unit holders				(32,711)			$ (32,711)
Ending balance (in shares) at Mar. 31, 2022							171,383,912
Ending balance at Mar. 31, 2022				1,668,525	1,586	2,832	$ 1,664,107
Beginning balance (in shares) at Dec. 31, 2021							171,126,257
Beginning balance at Dec. 31, 2021				1,690,079	(2,366)	2,834	$ 1,689,611
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	24,230			24,230
Other comprehensive (loss) income	6,565			6,565
Ending balance (in shares) at Sep. 30, 2022							171,569,807
Ending balance at Sep. 30, 2022				1,631,416	4,199	2,829	$ 1,624,388
Beginning balance (in shares) at Mar. 31, 2022							171,383,912
Beginning balance at Mar. 31, 2022				1,668,525	1,586	2,832	$ 1,664,107
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	4,651		14	4,651		(2)	$ 4,653
Other comprehensive (loss) income	1,935	1,929	6	1,935	1,935
Deferred compensation obligation	0
Share-based compensation activity (in shares)							191,368
Share-based compensation activity	1,917			1,917			$ 1,917
Adjustment of redeemable partnership units to liquidation value at period end				2,181			2,181
Distributions declared to general partnership unit holders				(32,705)			$ (32,705)
Ending balance (in shares) at Jun. 30, 2022							171,575,280
Ending balance at Jun. 30, 2022				1,646,504	3,521	2,830	$ 1,640,153
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	13,478		37	13,478		(1)	$ 13,479
Other comprehensive (loss) income	678	676	2	678	678
Deferred compensation obligation (in shares)							(6,573)
Deferred compensation obligation	(63)			(63)			$ (63)
Share-based compensation activity (in shares)							1,100
Share-based compensation activity	2,094			2,094			$ 2,094
Adjustment of redeemable partnership units to liquidation value at period end				1,428			1,428
Distributions declared to general partnership unit holders				(32,703)			$ (32,703)
Ending balance (in shares) at Sep. 30, 2022							171,569,807
Ending balance at Sep. 30, 2022				1,631,416	4,199	2,829	$ 1,624,388
Beginning balance (in shares) at Dec. 31, 2022							171,569,807
Beginning balance at Dec. 31, 2022				1,630,139	3,569	2,832	$ 1,623,738
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(5,276)		(17)	(5,276)		(1)	$ (5,275)
Other comprehensive (loss) income	(5,291)	(5,307)	16	(5,291)	(5,291)
Deferred compensation obligation (in shares)							(13,422)
Deferred compensation obligation	(88)			(88)			$ (88)
Share-based compensation activity (in shares)							171,318
Share-based compensation activity	3,371			3,371			$ 3,371
Adjustment of redeemable partnership units to liquidation value at period end				779			779
Distributions declared to general partnership unit holders				(32,734)			$ (32,734)
Ending balance (in shares) at Mar. 31, 2023							171,727,703
Ending balance at Mar. 31, 2023				1,590,900	(1,722)	2,831	$ 1,589,791
Beginning balance (in shares) at Dec. 31, 2022							171,569,807
Beginning balance at Dec. 31, 2022				1,630,139	3,569	2,832	$ 1,623,738
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(39,649)			(39,649)
Other comprehensive (loss) income	4,240			4,240
Ending balance (in shares) at Sep. 30, 2023							172,097,661
Ending balance at Sep. 30, 2023				1,512,086	7,809	2,811	$ 1,501,466
Beginning balance (in shares) at Mar. 31, 2023							171,727,703
Beginning balance at Mar. 31, 2023				1,590,900	(1,722)	2,831	$ 1,589,791
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(12,737)		(41)	(12,737)			$ (12,737)
Other comprehensive (loss) income	6,646	6,626	20	6,646	6,646
Deferred compensation obligation	0
Share-based compensation activity (in shares)							374,226
Share-based compensation activity	2,616			2,616			$ 2,616
Adjustment of redeemable partnership units to liquidation value at period end				(98)			(98)
Distributions declared to general partnership unit holders				(32,985)			$ (32,985)
Ending balance (in shares) at Jun. 30, 2023							172,101,929
Ending balance at Jun. 30, 2023				1,554,342	4,924	2,831	$ 1,546,587
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(21,636)		(82)	(21,636)		(20)	$ (21,616)
Other comprehensive (loss) income	2,885	$ 2,909	$ (24)	2,885	2,885
Deferred compensation obligation (in shares)							(4,268)
Deferred compensation obligation	(20)			(20)			$ (20)
Share-based compensation activity	$ 2,506			2,506			2,506
Adjustment of redeemable partnership units to liquidation value at period end				(41)			(41)
Distributions declared to general partnership unit holders				(25,950)			$ (25,950)
Ending balance (in shares) at Sep. 30, 2023							172,097,661
Ending balance at Sep. 30, 2023				$ 1,512,086	$ 7,809	$ 2,811	$ 1,501,466

BASIS OF PRESENTATION (Policies)	9 Months Ended
BASIS OF PRESENTATION (Policies)	Sep. 30, 2023
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 (“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, 2023, the results of its operations for the three and nine months ended September 30, 2023 and 2022 and its cash flows for the nine months ended September 30, 2023 and 2022. 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 Annual Report on Form 10-K for the year ended December 31, 2022 filed with the SEC on February 21, 2023. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements as of that date but does not include all the information and footnotes required by GAAP for complete financial statements.The Company’s Annual Report on Form 10-K for the year ended December 31, 2022 contains a discussion of the Company’s significant accounting policies under Note 2, “Summary of Significant Accounting Policies”. There have been no material changes in the Company’s significant accounting policies since December 31, 2022.
Use of Estimates	Use of EstimatesThe preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The estimates and assumptions include, but are not limited to, common development cost estimates for the Company’s contributions to development joint ventures. The common development cost estimates for development joint venture contributions are highly judgmental, covering significant future time horizons and are sensitive to cost escalation, sales price escalation and absorption, which are affected by expectations about future market or economic conditions. Actual results could differ from these and other estimates.

DEBT OBLIGATIONS - Schedule of Consolidated Debt Obligations Outstanding (Details) - USD ($)					3 Months Ended	9 Months Ended
	Sep. 30, 2023	Jul. 01, 2023	Mar. 01, 2023	Jan. 20, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Aug. 15, 2023	Dec. 31, 2022	Nov. 23, 2022
Consolidated debt obligations
Principal balance outstanding	$ 2,143,610,000				$ 2,143,610,000	$ 2,143,610,000
Plus: original issue premium (discount), net	2,159,000				2,159,000	2,159,000
Less: deferred financing costs	(11,309,000)				(11,309,000)	(11,309,000)
Debt, net	2,134,460,000				2,134,460,000	2,134,460,000			$ 1,965,038,000
Repayments of unsecured notes						54,301,000	$ 0
SECURED DEBT
Consolidated debt obligations
Principal balance outstanding	241,654,000				241,654,000	241,654,000			0
Less: deferred financing costs	(3,346,000)				(3,346,000)	(3,346,000)			0
SECURED DEBT \| $245.0M 5.88% Secured Term Loan due 2028
Consolidated debt obligations
Debt instrument, face amount	$ 245,000,000.0				$ 245,000,000.0	$ 245,000,000.0
Debt instrument, interest rate, stated percentage	5.88%				5.88%	5.88%
Principal balance outstanding	$ 245,000,000				$ 245,000,000	$ 245,000,000			0
Effective interest rate	5.88%				5.88%	5.88%
SECURED DEBT \| $50.0M Construction Loan due 2026
Consolidated debt obligations
Debt instrument, face amount								$ 50,000,000.0
Principal balance outstanding	$ 0				$ 0	$ 0			0
SECURED DEBT \| $50.0M Construction Loan due 2026 \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Debt instrument, interest rate, stated percentage								2.50%
SECURED DEBT \| Mortgage notes payable
Consolidated debt obligations
Principal balance outstanding	245,000,000				245,000,000	245,000,000			0
UNSECURED DEBT
Consolidated debt obligations
Principal balance outstanding	1,898,610,000				1,898,610,000	1,898,610,000			1,971,411,000
Plus: original issue premium (discount), net	2,159,000				2,159,000	2,159,000			2,934,000
Less: deferred financing costs	(7,963,000)				(7,963,000)	(7,963,000)			(9,307,000)
Debt, net	1,892,806,000				1,892,806,000	1,892,806,000			1,965,038,000
UNSECURED DEBT \| $600 million Unsecured Credit Facility
Consolidated debt obligations
Debt instrument, face amount	600,000,000				600,000,000	600,000,000
Principal balance outstanding	$ 0				0	$ 0			88,500,000
UNSECURED DEBT \| $600 million Unsecured Credit Facility \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Spread on variable rate						1.15%
UNSECURED DEBT \| $600 million Unsecured Credit Facility \| Daily SOFR Adjustment
Consolidated debt obligations
Spread on variable rate	0.10%					0.10%
UNSECURED DEBT \| Term Loan - Swapped to fixed
Consolidated debt obligations
Debt instrument, face amount										$ 250,000,000
Debt instrument, interest rate, stated percentage										5.01%
Principal balance outstanding	$ 250,000,000				250,000,000	$ 250,000,000			250,000,000
UNSECURED DEBT \| Term Loan - Swapped to fixed \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Spread on variable rate						1.30%
UNSECURED DEBT \| $70.0 million Term Loan
Consolidated debt obligations
Debt instrument, face amount	70,000,000		$ 70,000,000.0		70,000,000	$ 70,000,000
Principal balance outstanding	70,000,000				70,000,000	$ 70,000,000			0
Extension period						12 months
UNSECURED DEBT \| $70.0 million Term Loan \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Spread on variable rate						1.85%
UNSECURED DEBT \| $70.0 million Term Loan \| Daily SOFR Adjustment
Consolidated debt obligations
Spread on variable rate			0.10%			0.10%
UNSECURED DEBT \| $350.0M 3.95% Guaranteed Notes due 2023
Consolidated debt obligations
Debt instrument, face amount	$ 350,000,000.0				$ 350,000,000.0	$ 350,000,000.0
Debt instrument, interest rate, stated percentage	3.95%			3.95%	3.95%	3.95%
Principal balance outstanding	$ 0				$ 0	$ 0			54,301,000
Effective interest rate	3.87%				3.87%	3.87%
Repayments of unsecured notes				$ 55,200,000
Redemption on remaining principal amount				54,300,000
Interest payable				$ 920,000
UNSECURED DEBT \| $350.0M 4.10% Guaranteed Notes due 2024
Consolidated debt obligations
Debt instrument, face amount	$ 350,000,000.0				$ 350,000,000.0	$ 350,000,000.0
Debt instrument, interest rate, stated percentage	4.10%				4.10%	4.10%
Principal balance outstanding	$ 350,000,000				$ 350,000,000	$ 350,000,000			350,000,000
Effective interest rate	3.78%				3.78%	3.78%
UNSECURED DEBT \| $450.0M 3.95% Guaranteed Notes due 2027
Consolidated debt obligations
Debt instrument, face amount	$ 450,000,000.0				$ 450,000,000.0	$ 450,000,000.0
Debt instrument, interest rate, stated percentage	3.95%				3.95%	3.95%
Principal balance outstanding	$ 450,000,000				$ 450,000,000	$ 450,000,000			450,000,000
Effective interest rate	4.03%				4.03%	4.03%
UNSECURED DEBT \| $350.0M 7.80% Guaranteed Notes due 2028
Consolidated debt obligations
Debt instrument, face amount	$ 350,000,000.0				$ 350,000,000.0	$ 350,000,000.0
Debt instrument, interest rate, stated percentage	7.55%				7.55%	7.55%
Principal balance outstanding	$ 350,000,000				$ 350,000,000	$ 350,000,000			350,000,000
Effective interest rate	7.73%				7.73%	7.73%
Spread on variable rate					0.25%
UNSECURED DEBT \| $350.0M 4.55% Guaranteed Notes due 2029
Consolidated debt obligations
Debt instrument, face amount	$ 350,000,000.0				$ 350,000,000.0	$ 350,000,000.0
Debt instrument, interest rate, stated percentage	4.55%				4.55%	4.55%
Principal balance outstanding	$ 350,000,000				$ 350,000,000	$ 350,000,000			350,000,000
Effective interest rate	4.30%				4.30%	4.30%
UNSECURED DEBT \| Indenture IA (Preferred Trust I)
Consolidated debt obligations
Principal balance outstanding	$ 27,062,000				$ 27,062,000	$ 27,062,000			27,062,000
UNSECURED DEBT \| Indenture IA (Preferred Trust I) \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Spread on variable rate		1.51%				1.51%
UNSECURED DEBT \| Indenture IB (Preferred Trust I)
Consolidated debt obligations
Principal balance outstanding	25,774,000				25,774,000	$ 25,774,000			25,774,000
UNSECURED DEBT \| Indenture IB (Preferred Trust I) \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Spread on variable rate		1.51%				1.51%
UNSECURED DEBT \| Indenture II (Preferred Trust II)
Consolidated debt obligations
Principal balance outstanding	$ 25,774,000				$ 25,774,000	$ 25,774,000			$ 25,774,000
UNSECURED DEBT \| Indenture II (Preferred Trust II) \| Secured Overnight Financing Rate (SOFR)
Consolidated debt obligations
Spread on variable rate		1.51%				1.51%

PARTNERS' EQUITY OF THE PARENT COMPANY

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

PARTNERS' EQUITY OF THE PARENT COMPANY

12. PARTNERS’ EQUITY OF THE PARENT COMPANY

Earnings per Common Partnership Unit


	Three Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(21,636)	$	(21,636)	$	13,478	$	13,478
Net loss attributable to noncontrolling interests	20		20		1		1
Nonforfeitable dividends allocated to unvested restricted unitholders	(159)		(159)		(105)		(105)


Net income (loss) attributable to common unitholders	$	(21,775)	$	(21,775)	$	13,374	$	13,374
Denominator
Weighted-average units outstanding	172,614,128		172,614,128		172,086,274		172,086,274
Contingent securities/Share based compensation	—		—		—		582,449
Total weighted-average units outstanding	172,614,128		172,614,128		172,086,274		172,668,723
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	$	(0.13)	$	(0.13)	$	0.08	$	0.08


	Nine Months Ended September 30,
	2023				2022
	Basic		Diluted		Basic		Diluted
Numerator
Net income (loss)	$	(39,649)	$	(39,649)	$	24,230	$	24,230
Net loss attributable to noncontrolling interests	21		21		5		5
Nonforfeitable dividends allocated to unvested restricted unitholders	(433)		(433)		(351)		(351)


Net income (loss) attributable to common unitholders	$	(40,061)	$	(40,061)	$	23,884	$	23,884
Denominator
Weighted-average units outstanding	172,429,019		172,429,019		172,019,701		172,019,701
Contingent securities/Share based compensation	—		—		—		970,217
Total weighted-average units outstanding	172,429,019		172,429,019		172,019,701		172,989,918
Earnings (loss) per Common Partnership Unit:
Net income (loss) attributable to common unitholders	$	(0.23)	$	(0.23)	$	0.14	$	0.14

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 unit. For the three and nine months ended September 30, 2023 and 2022, earnings representing nonforfeitable dividends were allocated to the unvested restricted units issued 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 20, 2023, the Operating Partnership declared a distribution of $0.15 per common partnership unit, totaling $26.0 million, which was paid on October 18, 2023 to unitholders of record as of October 4, 2023.

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, 2023 and September 30, 2022, the Company did not repurchase any units.

LIMITED PARTNERS' NONCONTROLLING INTERESTS IN THE PARENT COMPANY (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Noncontrolling Interest [Abstract]
Aggregate amount related to non-controlling interests classified within equity	$ 3.7	$ 4.9
Settlement value of non controlling interest in operating partnership	$ 2.3	$ 3.2

LIMITED PARTNERS' NONCONTROLLING INTERESTS IN THE PARENT COMPANY	9 Months Ended
	Sep. 30, 2023
Noncontrolling Interest [Abstract]
LIMITED PARTNERS' NONCONTROLLING INTERESTS IN THE PARENT COMPANY	10. LIMITED PARTNERS’ NONCONTROLLING INTERESTS IN THE PARENT COMPANY Noncontrolling 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 noncontrolling interests associated with the redeemable common limited partnership units in the accompanying consolidated balance sheet of the Parent Company was $3.7 million and $4.9 million as of September 30, 2023 and December 31, 2022, respectively. Under the applicable accounting guidance, the redemption value of the redeemable common limited partnership units is carried at fair value. The aggregate settlement value of these units (based on the number of units outstanding and the average closing price of the common shares during the last five business days of the quarter ended September 30, 2023) was approximately $2.3 million and $3.2 million as of September 30, 2023 and December 31, 2022, respectively.

SEGMENT INFORMATION - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Investment in real estate ventures	$ 592,948		$ 592,948		$ 532,224
Equity in income (loss) of real estate venture	(10,739)	$ (6,260)	(24,504)	$ (15,804)
Philadelphia CBD
Segment Reporting Information [Line Items]
Investment in real estate ventures	453,917		453,917		387,301
Equity in income (loss) of real estate venture	(6,537)	(3,452)	(14,208)	(8,798)
Metropolitan Washington, D.C.
Segment Reporting Information [Line Items]
Investment in real estate ventures	82,350		82,350		83,903
Equity in income (loss) of real estate venture	(1,306)	(706)	(3,896)	(1,273)
Mid-Atlantic Office JV
Segment Reporting Information [Line Items]
Investment in real estate ventures	28,335		28,335		31,005
Equity in income (loss) of real estate venture	182	(83)	595	234
MAP Venture
Segment Reporting Information [Line Items]
Investment in real estate ventures	(45,148)		(45,148)		(35,411)
Equity in income (loss) of real estate venture	(3,078)	(2,019)	(6,995)	(5,967)
Austin, Texas
Segment Reporting Information [Line Items]
Investment in real estate ventures	73,494		73,494		$ 65,426
Equity in income (loss) of real estate venture	$ 0	$ 0	$ 0	$ 0

CONSOLIDATED BALANCE SHEETS - BRANDYWINE OPERATING PARTNERSHIP, L.P. (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accrued rent receivable, allowance	$ 3,158	$ 3,947
Common stock, shares issued (in shares)	172,097,661	171,569,807
Common stock, shares outstanding (in shares)	172,097,661	171,569,807
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Accrued rent receivable, allowance	$ 3,158	$ 3,947
Common stock, shares issued (in shares)	172,097,661	171,569,807
Common stock, shares outstanding (in shares)	172,097,661	171,569,807
BRANDYWINE OPERATING PARTNERSHIP, L.P. \| Class A Units
Redeemable limited partnership units issued (in shares)	516,467	516,467
Redeemable limited partnership units outstanding (in shares)	516,467	516,467

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2023

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
				9/30/2023		12/31/2022						9/30/2023		12/31/2022



Assets/(Liabilities)
Swap	Interest Rate	Cash Flow	(a)	$	250,000	$	250,000	3.729	%	November 23, 2022	June 30, 2027	$	6,065	$	255
				$	250,000	$	250,000

(a)Hedging unsecured variable rate debt.

LEASES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
LEASES (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Fixed contractual payments	$ 94,478	$ 90,632	$ 279,129	$ 268,067
Variable lease payments	23,851	24,078	72,754	73,643
Total	$ 118,329	$ 114,710	$ 351,883	$ 341,710

CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accrued rent receivable, allowance	$ 3,158	$ 3,947
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 (in shares)	172,097,661	171,569,807
Common stock, shares outstanding (in shares)	172,097,661	171,569,807
Common shares in grantor trust, issued and outstanding (in shares)	1,194,127	1,179,643

SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of 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, 2023		December 31, 2022
Philadelphia CBD	$	1,521,723	$	1,517,801
Pennsylvania Suburbs	915,659		878,546
Austin, Texas	798,141		851,835
Total Core Segments	3,235,523		3,248,182
Other	460,543		369,058


Operating properties	$	3,696,066	$	3,617,240

Corporate
Right of use asset - operating leases, net	$	19,188	$	19,664
Construction-in-progress	$	143,929	$	218,869
Land held for development	$	76,058	$	76,499
Prepaid leasehold interests in land held for development, net	$	27,762	$	35,576

Net operating income:


	Three Months Ended September 30,
	2023						2022
	Total revenue		Operating expenses (a)		Net operating income		Total revenue		Operating expenses (a)		Net operating income
Philadelphia CBD	$	56,367	$	(18,609)	$	37,758	$	56,105	$	(20,080)	$	36,025
Pennsylvania Suburbs	32,611		(9,770)		22,841		32,709		(11,022)		21,687
Austin, Texas	24,457		(10,044)		14,413		22,509		(8,597)		13,912
Other	10,295		(5,526)		4,769		8,874		(5,089)		3,785

Corporate	5,642		(2,450)		3,192		5,372		(2,698)		2,674
Operating properties	$	129,372	$	(46,399)	$	82,973	$	125,569	$	(47,486)	$	78,083


	Nine Months Ended September 30,
	2023						2022
	Total revenue		Operating expenses (a)		Net operating income		Total revenue		Operating expenses (a)		Net operating income
Philadelphia CBD	$	169,265	$	(59,452)	$	109,813	$	165,002	$	(60,361)	$	104,641
Pennsylvania Suburbs	97,484		(29,633)		67,851		95,849		(31,438)		64,411
Austin, Texas	73,475		(30,021)		43,454		71,345		(29,328)		42,017
Other	28,572		(15,788)		12,784		27,078		(15,985)		11,093
Corporate	15,685		(8,359)		7,326		17,842		(7,941)		9,901
Operating properties	$	384,481	$	(143,253)	$	241,228	$	377,116	$	(145,053)	$	232,063

Includes property operating expenses, real estate taxes and third-party management expense.


Unconsolidated real estate ventures:
	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, 2023		December 31, 2022		2023		2022		2023		2022
Philadelphia CBD	$	453,917	$	387,301	$	(6,537)	$	(3,452)	$	(14,208)	$	(8,798)
Metropolitan Washington, D.C.	82,350		83,903		(1,306)		(706)		(3,896)		(1,273)
Mid-Atlantic Office JV	28,335		31,005		182		(83)		595		234
MAP Venture	(45,148)		(35,411)		(3,078)		(2,019)		(6,995)		(5,967)

Austin, Texas	73,494		65,426		—		—		—		—
Total	$	592,948	$	532,224	$	(10,739)	$	(6,260)	$	(24,504)	$	(15,804)

Schedule of Reconciliation of Consolidated Net Income to Consolidated NOI

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


	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net income (loss)	$	(21,636)	$	13,478	$	(39,649)	$	24,230
Plus:
Interest expense	24,355		17,061		70,677		49,144
Interest expense - amortization of deferred financing costs	1,110		745		3,251		2,259

Depreciation and amortization	48,966		45,134		141,645		132,875
General and administrative expenses	8,069		7,564		26,911		25,892
Equity in loss of unconsolidated real estate ventures	10,739		6,260		24,504		15,804
Provision for impairment	11,666		—		16,134		—

Less:
Interest income	293		498		1,318		1,387
Income tax benefit (provision)	3		9		(35)		(66)

Net gain on disposition of real estate	—		8,669		—		8,813
Net gain on sale of undepreciated real estate	—		2,983		781		8,007
Net gain on real estate venture transactions	—		—		181		—

Consolidated net operating income	$	82,973	$	78,083	$	241,228	$	232,063

INTANGIBLE ASSETS AND LIABILITIES - Summary of Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
2023 (three months remaining)	$ 845
2024	1,818
2025	1,485
2026	1,093
2027	808
Thereafter	2,490
Intangible Assets, net	8,539	$ 18,451
Liabilities
2023 (three months remaining)	266
2024	929
2025	869
2026	739
2027	623
Thereafter	5,110
Intangible Liabilities, net	$ 8,536	$ 10,322

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

9 Months Ended

Sep. 30, 2023

Equity Method Investments and Joint Ventures [Abstract]

INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

4. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES

As of September 30, 2023, the Company held ownership interests in twelve unconsolidated real estate ventures, with a net aggregate investment balance of $593.0 million, which includes a negative investment balance in one unconsolidated real estate venture of $45.1 million, reflected within “Other liabilities” on the consolidated balance sheets. As of September 30, 2023, five of the real estate ventures owned properties that contained an aggregate of approximately 9.1 million net rentable square feet of office space; two real estate ventures owned 1.4 acres of land held for development; four real estate ventures owned 7.5 acres of land in active development; one real estate venture owned a mixed used tower comprised of 250 apartment units and 0.2 million net rentable square feet of office/retail space.

The Company accounts for its interests in the unconsolidated real estate ventures, which range from 15% to 78%, using the equity method. Certain of the unconsolidated real estate ventures are subject to specified priority allocations of distributable cash.

The Company earned management fees from the unconsolidated real estate ventures of $2.1 million and $2.2 million for the three months ended September 30, 2023 and 2022, respectively, and $6.2 million for both the nine months ended September 30, 2023 and 2022, respectively. The Company earned leasing commissions from the unconsolidated real estate ventures of $1.5 million and $0.7 million for the three months ended September 30, 2023 and 2022, respectively, and $2.9 million and $2.6 million for the nine months ended September 30, 2023 and 2022, respectively

The Company had outstanding accounts receivable balances from the unconsolidated real estate ventures of $3.4 million and $2.9 million for both September 30, 2023 and December 31, 2022, respectively.

The amounts reflected in the following tables (except for the Company’s share of equity in income) are based on the financial information of the individual unconsolidated real estate ventures.

The following is a summary of the financial position of the unconsolidated real estate ventures in which the Company held interests as of September 30, 2023 and December 31, 2022 (in thousands):


	September 30, 2023		December 31, 2022
Net property	$	2,317,405	$	2,117,226
Other assets	533,540		506,213
Other liabilities	444,052		446,101
Debt, net	1,378,347		1,198,213
Equity (a)	1,028,546		979,125


	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Revenue	$	58,986	$	63,800	$	175,939	$	181,973
Operating expenses	(31,641)		(32,735)		(90,531)		(92,998)
Interest expense, net	(21,591)		(14,012)		(55,769)		(33,144)
Depreciation and amortization	(24,635)		(28,064)		(73,636)		(77,274)


Net loss	$	(18,881)	$	(11,011)	$	(43,997)	$	(21,443)
Ownership interest %	Various		Various		Various		Various
Company's share of net loss	$	(10,130)	$	(6,092)	$	(23,782)	$	(15,531)

Basis adjustments and other	(609)		(168)		(722)		(273)
Equity in loss of unconsolidated real estate ventures	$	(10,739)	$	(6,260)	$	(24,504)	$	(15,804)

Commerce Square Venture

The properties held by the Commerce Square Venture were encumbered by secured mortgage loans that were set to mature on April 5, 2023. The lender provided the venture with an extension of the maturity date of these loans until June 5, 2023. On June 2, 2023, the loans were refinanced through a new $220.0 million secured mortgage loan facility. The new loan facility bears an all-in fixed interest rate of 7.79% per annum and matures in June 2028.

In connection with the refinancing, the Company contributed $46.5 million to the Commerce Square Venture in exchange for an additional 8% equity interest in the venture.

MAP Venture

The MAP Venture owns 58 office properties that contain an aggregate of 3,924,783 net rentable square feet located in the Pennsylvania Suburbs, New Jersey/Delaware, Metropolitan Washington, D.C. and Richmond, Virginia (the “MAP Venture”). The MAP Venture leases the land parcels under the 58 office properties through a ground lease that extends through February 2115. The properties held by the MAP Venture are encumbered by a mortgage on the MAP Venture's leasehold interest in the buildings ("MAP Collateral") and the assignment of the related rents and leases and is nonrecourse to the Company. The mortgage loan had an original maturity date of August 1, 2023. The lender provided the MAP Venture with two successive two-month extensions until December 1, 2023. At September 30, 2023, the mortgage balance was $180.4 million. The Company and its partner are actively working to recapitalize the MAP Venture and the mortgage debt prior to maturity, but there can be no assurances that the debt will be satisfied or additional extension options will be provided by the existing lender. At September 30, 2023, the Company's negative investment balance was $45.1 million. The Company has no obligation to fund additional equity to the MAP Venture.

3025 JFK Venture

During the three months ended September 30, 2023, the Company contributed $6.7 million to the 3025 JFK Venture increasing Company's equity ownership from 55% to 58%. Utilizing the proceeds from the contribution, the 3025 JFK Venture entered into an interest rate cap agreement to help mitigate the interest rate volatility associated with the variable interest rate on the 3025 JFK Venture's construction loan, which is scheduled to mature in July 2025. The interest rate cap has an initial notional value of $148.0 million which accretes up to $187.0 million following the projected draw schedule. The strike rate of the interest rate cap is 3.00% and the stated interest rate of the construction loan is SOFR + 3.6%. With the interest rate cap in-place, the maximum interest rate due by the 3025 JFK Venture is 6.60%.

One Uptown - Office Venture

On September 29, 2023, the Company contributed of $2.1 million to the One Uptown - Office Venture, increasing the Company's aggregate investment balance to $41.8 million at September 30, 2023 the Company's equity ownership from 50% to 54%. The contribution was used to pay interest on the One Uptown - Office Venture construction loan and arose from higher than budgeted interest carry costs.

BENEFICIARIES' EQUITY OF THE PARENT COMPANY - Schedule of 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, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator
Net income (loss)	$ (21,636)	$ (12,737)	$ (5,276)	$ 13,478	$ 4,651	$ 6,101	$ (39,649)	$ 24,230
Net (income) loss attributable to noncontrolling interests, Basic	82			(37)			140	(59)
Net (income) loss attributable to noncontrolling interests, Diluted	82			(37)			140	(59)
Nonforfeitable dividends allocated to unvested restricted shareholders, Basic	(159)			(105)			(433)	(351)
Nonforfeitable dividends allocated to unvested restricted shareholders, Diluted	(159)			(105)			(433)	(351)
Net income (loss) attributable to Common Shareholders of Brandywine Realty Trust	(21,713)			13,336			(39,942)	23,820
Net income (loss) attributable to common shareholders, diluted	$ (21,713)			$ 13,336			$ (39,942)	$ 23,820
Denominator
Basic weighted average shares outstanding (in shares)	172,097,661			171,569,807			171,912,552	171,464,936
Contingent securities/Share based compensation (in shares)	0			582,449			0	970,217
Weighted average shares outstanding, diluted (in shares)	172,097,661			172,152,256			171,912,552	172,435,153
Earnings (loss) per Common Share:
Net income attributable to common shareholders, Basic (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14
Net income attributable to common shareholders, Diluted (in dollars per share)	$ (0.13)			$ 0.08			$ (0.23)	$ 0.14

SEGMENT INFORMATION - Narrative (Details)	9 Months Ended
SEGMENT INFORMATION - Narrative (Details)	Sep. 30, 2023 segment
Segment Reporting [Abstract]
Number of reportable segments	4

CONSOLIDATED STATEMENTS OF CASH FLOWS - BRANDYWINE OPERATING PARTNERSHIP L.P. (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Capitalized interest	$ 12,602	$ 7,274
BRANDYWINE OPERATING PARTNERSHIP, L.P.
Capitalized interest	$ 12,602	$ 7,274