CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ (12,737)	$ (5,276)	$ 4,651	$ 6,101	$ (18,013)	$ 10,752
Comprehensive income:
Unrealized gain on derivative financial instruments		6,646		1,747		1,355	5,511
Amortization of interest rate contracts	[1]	0		188		0	376
Total comprehensive income		6,646	$ (5,291)	1,935	$ 3,952	1,355	5,887
Comprehensive income (loss)		(6,091)		6,586		(16,658)	16,639
Comprehensive (income) loss attributable to noncontrolling interest		21		(20)		22	(40)
Comprehensive income (loss) attributable to Brandywine Realty Trust		$ (6,070)		$ 6,566		$ (16,636)	$ 16,599

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