CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 147,821	$ 220,850	$ 199,870	$ 205,232
Other comprehensive income (loss):
Change in unrealized loss on interest rate swaps, net	(5,549)	(446)	(5,625)	(413)
Other comprehensive loss	(5,549)	(446)	(5,625)	(413)
Comprehensive income	142,272	220,404	194,245	204,819
Comprehensive income attributable to noncontrolling interests	(4,502)	(2,834)	(5,191)	(3,225)
Comprehensive income attributable to Lexington Realty Trust shareholders	$ 137,770	$ 217,570	$ 189,054	$ 201,594