CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Gross revenues:
Rental	$ 89,704	$ 98,602	$ 265,923	$ 310,804
Tenant reimbursements	7,985	7,379	23,549	23,366
Total gross revenues	97,689	105,981	289,472	334,170
Expense applicable to revenues:
Depreciation and amortization	(43,495)	(40,288)	(128,706)	(124,687)
Property operating	(11,694)	(11,472)	(36,784)	(34,843)
General and administrative	(7,963)	(7,510)	(25,561)	(23,032)
Litigation reserve	(2,050)	0	(2,050)	0
Non-operating income	1,005	3,080	4,997	9,500
Interest and amortization expense	(18,887)	(23,001)	(57,828)	(68,573)
Debt satisfaction gains (charges), net	2,424	2,538	2,378	(818)
Impairment charges and loan loss	(21,986)	(72,890)	(43,577)	(75,904)
Gains on sales of properties	10,645	16,072	55,078	58,413
Income (loss) before provision for income taxes and equity in earnings (losses) of non-consolidated entities	5,688	(27,490)	57,419	74,226
Provision for income taxes	(375)	(462)	(1,174)	(1,099)
Equity in earnings (losses) of non-consolidated entities	283	340	(1,064)	6,394
Net income (loss)	5,596	(27,612)	55,181	79,521
Less net (income) loss attributable to noncontrolling interests	(55)	2,260	(448)	102
Net income (loss) attributable to Lexington Realty Trust shareholders	5,541	(25,352)	54,733	79,623
Allocation to participating securities	(52)	(50)	(183)	(187)
Net income (loss) attributable to common shareholders	$ 3,916	$ (26,975)	$ 49,832	$ 74,718
Net income (loss) attributable to common shareholders - per common share basic (in dollars per share)	$ 0.02	$ (0.12)	$ 0.21	$ 0.32
Weighted-average common shares outstanding – basic (in shares)	237,989,098	234,207,396	237,632,572	233,151,600
Net income (loss) attributable to common shareholders – per common share diluted (in dollars per share)	$ 0.02	$ (0.12)	$ 0.21	$ 0.31
Weighted-average common shares outstanding – diluted (in shares)	241,702,715	234,207,396	241,442,227	237,215,883
Series C [Member]
Expense applicable to revenues:
Dividends attributable to preferred shares – Series C	$ (1,573)	$ (1,573)	$ (4,718)	$ (4,718)
LCIF [Member]
Gross revenues:
Rental	19,126	28,496	55,125	98,648
Tenant reimbursements	2,116	2,062	6,044	6,782
Total gross revenues	21,242	30,558	61,169	105,430
Expense applicable to revenues:
Depreciation and amortization	(10,114)	(7,793)	(28,495)	(25,402)
Property operating	(3,000)	(3,371)	(9,599)	(11,079)
General and administrative	(1,727)	(2,643)	(5,019)	(7,112)
Non-operating income	3	44	235	299
Interest and amortization expense	(4,099)	(7,109)	(11,438)	(23,835)
Debt satisfaction gains (charges), net	0	(5,773)	0	(7,388)
Impairment charges and loan loss	(6,802)	(65,509)	(12,061)	(67,935)
Gains on sales of properties	0	0	0	16,029
Income (loss) before provision for income taxes and equity in earnings (losses) of non-consolidated entities	(4,497)	(61,596)	(5,208)	(20,993)
Provision for income taxes	(4)	(32)	(30)	(57)
Equity in earnings (losses) of non-consolidated entities	79	49	338	252
Net income (loss)	$ (4,422)	$ (61,579)	$ (4,900)	$ (20,798)
Net income (loss) per unit (in dollars per unit)	$ (0.05)	$ (0.74)	$ (0.06)	$ (0.25)
Weighted-average units outstanding (in units)	83,125,058	83,241,396	83,202,190	83,241,396