CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY - USD ($) $ in Thousands	Total	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest - Consolidated Real Estate Ventures	BRANDYWINE OPERATING PARTNERSHIP, L.P.	BRANDYWINE OPERATING PARTNERSHIP, L.P. Accumulated Other Comprehensive Income (Loss)	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 Stockholders' Equity [Roll Forward]
Net income (loss)	$ 53,992		$ 168	53,992		(2)	$ 53,994
Other comprehensive income (loss)	5,935	$ 5,917	18	5,935	5,935
Deferred compensation obligation (in shares)							(25,979)
Deferred compensation obligation	(312)			(312)			$ (312)
Repurchase and retirement of LP units				(4,006)			$ (4,006)
Share-based compensation activity (in shares)							469,529
Share-based compensation activity	7,718			7,718			$ 7,718
Adjustment of redeemable partnership units to liquidation value at period end				7,555			7,555
Distributions declared to general partnership unitholders				(130,822)			$ (130,822)
Ending balance (in shares) at Dec. 31, 2022							171,569,807
Ending balance at Dec. 31, 2022				1,630,139	3,569	2,832	$ 1,623,738
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(197,403)		(614)	(197,403)		(22)	$ (197,381)
Other comprehensive income (loss)	(4,579)	(4,565)	(14)	(4,579)	(4,579)
Deferred compensation obligation (in shares)							(17,690)
Deferred compensation obligation	(108)			(108)			$ (108)
Share-based compensation activity (in shares)							545,544
Share-based compensation activity	10,880			10,880			$ 10,880
Adjustment of redeemable partnership units to liquidation value at period end				60			60
Distributions declared to general partnership unitholders				(117,617)			$ (117,617)
Ending balance (in shares) at Dec. 31, 2023							172,097,661
Ending balance at Dec. 31, 2023				1,321,372	(1,010)	2,810	$ 1,319,572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(196,487)		(580)	(196,487)		5	$ (196,492)
Other comprehensive income (loss)	3,200	$ 3,189	$ 11	3,200	3,200
Deferred compensation obligation (in shares)							(33,372)
Deferred compensation obligation	(159)			(159)			$ (159)
Share-based compensation activity (in shares)							601,706
Share-based compensation activity	$ 18,892			18,892			$ 18,892
Adjustment of redeemable partnership units to liquidation value at period end				(393)			(393)
Distributions declared to general partnership unitholders				(104,708)			$ (104,708)
Ending balance (in shares) at Dec. 31, 2024							172,665,995
Ending balance at Dec. 31, 2024				$ 1,041,717	$ 2,190	$ 2,815	$ 1,036,712