Equity - Effects of Changes in Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity [Abstract]
Net income attributable to Lexington Realty Trust shareholders	$ 72,678	$ 18,866	$ 113,720	$ 37,020
Transfers from noncontrolling interests:
Increase in additional paid-in-capital for reallocation of noncontrolling interests			435	0
Increase in additional paid-in-capital for redemption of noncontrolling OP units			468	482
Change from net income attributable to shareholders and transfers from noncontrolling interests			$ 114,623	$ 37,502