CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 285,293	$ 230,906	$ 86,629
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	(2,004)	(989)	2,098
Other comprehensive income (loss)	(2,004)	(989)	2,098
Comprehensive income	283,289	229,917	88,727
Comprehensive income attributable to noncontrolling interests	(5,383)	(3,491)	(1,046)
Comprehensive income attributable to Lexington Realty Trust shareholders	$ 277,906	$ 226,426	$ 87,681