CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Income	$ 86,629	$ 96,450	$ 114,891
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	2,098	906	(2,343)
Other comprehensive income (loss)	2,098	906	(2,343)
Comprehensive income	88,727	97,356	112,548
Comprehensive income attributable to noncontrolling interests	(1,046)	(826)	(3,188)
Comprehensive income attributable to Lexington Realty Trust shareholders	$ 87,681	$ 96,530	$ 109,360