CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 12,366	$ 307,326	$ 34,529
Comprehensive income (loss):
Unrealized gain (loss) on derivative financial instruments		4,817	(5,972)	(8,210)
Amortization of interest rate contracts	[1]	752	752	770
Total comprehensive income (loss)		5,569	(5,220)	(7,440)
Comprehensive income		17,935	302,106	27,089
Comprehensive income attributable to noncontrolling interest		(105)	(1,770)	(221)
Comprehensive income attributable to Brandywine Realty Trust/Brandywine Operating Partnership		$ 17,830	$ 300,336	$ 26,868

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