CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement of Income and Comprehensive Income [Abstract]
Net income (loss)	$ (2,123)	$ 5,478
Other comprehensive income (loss):
Change in unrealized gain (loss) on interest rate swaps, net	702	(56)
Other comprehensive income (loss)	702	(56)
Comprehensive income (loss)	(1,421)	5,422
Comprehensive income attributable to noncontrolling interests	(497)	(1,867)
Comprehensive income (loss) attributable to Lexington Realty Trust shareholders	$ (1,918)	$ 3,555