CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 230,906	$ 86,629	$ 96,450
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	(989)	2,098	906
Other comprehensive income (loss)	(989)	2,098	906
Comprehensive income	229,917	88,727	97,356
Comprehensive income attributable to noncontrolling interests	(3,491)	(1,046)	(826)
Comprehensive income attributable to Lexington Realty Trust shareholders	$ 226,426	$ 87,681	$ 96,530