CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (795)	$ 7,365	$ (15,618)	$ 49,585
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	(213)	184	33	1,476
Other comprehensive income (loss)	(213)	184	33	1,476
Comprehensive income (loss)	(1,008)	7,549	(15,585)	51,061
Comprehensive income attributable to noncontrolling interests	(899)	(213)	(391)	(393)
Comprehensive income (loss) attributable to Lexington Realty Trust shareholders	$ (1,907)	$ 7,336	$ (15,976)	$ 50,668