CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (14,823)	$ 42,220
Other comprehensive income (loss):
Change in unrealized gain on interest rate swaps, net	246	1,292
Other comprehensive income	246	1,292
Comprehensive income (loss)	(14,577)	43,512
Comprehensive (income) loss attributable to noncontrolling interests	508	(180)
Comprehensive income (loss) attributable to Lexington Realty Trust shareholders	$ (14,069)	$ 43,332