CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (165,720)	$ 30,267	$ (16,414)	$ (21,636)	$ (12,737)	$ (5,276)	$ (151,867)	$ (39,649)
Comprehensive income (loss):
Unrealized gain (loss) on derivative financial instruments	(9,919)			2,885			(3,112)	4,240
Total comprehensive income (loss)	(9,919)	$ 781	$ 6,026	2,885	$ 6,646	$ (5,291)	(3,112)	4,240
Comprehensive loss	(175,639)			(18,751)			(154,979)	(35,409)
Comprehensive loss attributable to noncontrolling interest	529			106			459	128
Comprehensive loss attributable to Brandywine Realty Trust	$ (175,110)			$ (18,645)			$ (154,520)	$ (35,281)