CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY - BRANDYWINE OPERATING PARTNERSHIP, L.P. - USD ($) $ in Thousands	Total	Brandywine Operating Partnership, L.P.	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Brandywine Operating Partnership, L.P.	Noncontrolling Interest - Consolidated Real Estate Ventures	Noncontrolling Interest - Consolidated Real Estate Ventures Brandywine Operating Partnership, L.P.	General Partner Capital Brandywine Operating Partnership, L.P.
Beginning balance (in shares) at Dec. 31, 2023							172,097,661
Beginning balance at Dec. 31, 2023		$ 1,321,372		$ (1,010)		$ 2,810	$ 1,319,572
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	$ (16,414)	(16,414)			$ (46)	3	$ (16,417)
Other comprehensive income (loss)	6,026	6,026	$ 6,007	6,026	19
Deferred compensation obligation (in shares)							(21,234)
Deferred compensation obligation	(100)	(100)					$ (100)
Share-based compensation activity (in shares)							194,480
Share-based compensation activity	4,831	4,831					$ 4,831
Adjustment of redeemable partnership units to liquidation value at period end		316					316
Distributions declared to general partnership unit holders		(26,177)					$ (26,177)
Ending balance (in shares) at Mar. 31, 2024							172,270,907
Ending balance at Mar. 31, 2024		1,289,854		5,016		2,813	$ 1,282,025
Beginning balance (in shares) at Dec. 31, 2023							172,097,661
Beginning balance at Dec. 31, 2023		1,321,372		(1,010)		2,810	$ 1,319,572
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	13,853	13,853
Other comprehensive income (loss)	6,807	6,807
Ending balance (in shares) at Jun. 30, 2024							172,678,090
Ending balance at Jun. 30, 2024		1,297,098		5,797		2,816	$ 1,288,485
Beginning balance (in shares) at Mar. 31, 2024							172,270,907
Beginning balance at Mar. 31, 2024		1,289,854		5,016		2,813	$ 1,282,025
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	30,267	30,267			94	3	$ 30,264
Other comprehensive income (loss)	781	781	778	781	3
Deferred compensation obligation (in shares)							(43)
Deferred compensation obligation	0	0
Share-based compensation activity (in shares)							407,226
Share-based compensation activity	2,359	2,359					$ 2,359
Adjustment of redeemable partnership units to liquidation value at period end		16					16
Distributions declared to general partnership unit holders		(26,179)					$ (26,179)
Ending balance (in shares) at Jun. 30, 2024							172,678,090
Ending balance at Jun. 30, 2024		1,297,098		5,797		2,816	$ 1,288,485
Beginning balance (in shares) at Dec. 31, 2024							172,665,995
Beginning balance at Dec. 31, 2024		1,041,717		2,190		2,815	$ 1,036,712
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(27,056)	(27,056)			(81)		$ (27,056)
Other comprehensive income (loss)	(2,552)	(2,552)	(2,544)	(2,552)	(8)
Deferred compensation obligation (in shares)							(54,808)
Deferred compensation obligation	(406)	(406)					$ (406)
Share-based compensation activity (in shares)							439,776
Share-based compensation activity	11,298	11,298					$ 11,298
Adjustment of redeemable partnership units to liquidation value at period end		476					476
Distributions declared to general partnership unit holders		(26,398)					$ (26,398)
Ending balance (in shares) at Mar. 31, 2025							173,050,963
Ending balance at Mar. 31, 2025		997,079		(362)		2,815	$ 994,626
Beginning balance (in shares) at Dec. 31, 2024							172,665,995
Beginning balance at Dec. 31, 2024		1,041,717		2,190		2,815	$ 1,036,712
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(115,992)	(115,992)
Other comprehensive income (loss)	(3,651)	(3,651)
Ending balance (in shares) at Jun. 30, 2025							173,702,177
Ending balance at Jun. 30, 2025		883,054		(1,461)		2,815	$ 881,700
Beginning balance (in shares) at Mar. 31, 2025							173,050,963
Beginning balance at Mar. 31, 2025		997,079		(362)		2,815	$ 994,626
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(88,936)	(88,936)			(267)		$ (88,936)
Other comprehensive income (loss)	(1,099)	(1,099)	$ (1,095)	(1,099)	$ (4)
Deferred compensation obligation (in shares)							(75,638)
Deferred compensation obligation	(42)	(42)					$ (42)
Share-based compensation activity (in shares)							726,852
Share-based compensation activity	$ 2,380	2,379					$ 2,379
Adjustment of redeemable partnership units to liquidation value at period end		53					53
Distributions declared to general partnership unit holders		(26,380)					$ (26,380)
Ending balance (in shares) at Jun. 30, 2025							173,702,177
Ending balance at Jun. 30, 2025		$ 883,054		$ (1,461)		$ 2,815	$ 881,700