CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 7,058	$ 43,618	$ 122,320	$ 81,169
Other comprehensive income (loss):
Change in unrealized income (loss) on interest rate swaps, net	1,150	1,043	7,072	(17,759)
Other comprehensive income (loss)	1,150	1,043	7,072	(17,759)
Comprehensive income	8,208	44,661	129,392	63,410
Comprehensive income attributable to noncontrolling interests	(420)	(1,714)	(1,962)	(2,245)
Comprehensive income attributable to Lexington Realty Trust shareholders	$ 7,788	$ 42,947	$ 127,430	$ 61,165