CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 5,596	$ (27,612)	$ 55,181	$ 79,521
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	67	2,637	1,543	(2,944)
Other comprehensive income (loss)	67	2,637	1,543	(2,944)
Comprehensive income (loss)	5,663	(24,975)	56,724	76,577
Comprehensive (income) loss attributable to noncontrolling interests	(55)	2,260	(448)	102
Comprehensive income (loss) attributable to Lexington Realty Trust shareholders	$ 5,608	$ (22,715)	$ 56,276	$ 76,679