CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Gross revenues:
Advisory and incentive fees	$ 313,081	$ 280,410	$ 273,788
Advisory and incentive fees	1,806	2,012	1,108
Tenant reimbursements	29,992	31,404	30,454
Total gross revenues	344,879	313,826	305,350
Expense applicable to revenues:
Depreciation and amortization	(161,876)	(156,358)	(149,474)
Property operating	(60,213)	(58,229)	(59,194)
General and administrative	(23,956)	(22,200)	(22,456)
Non-operating income	6,888	13,020	11,811
Interest and amortization expense	(98,803)	(106,478)	(116,516)
Debt satisfaction gains (charges), net	(9,480)	45	212
Change in value of forward equity commitment	0	2,030	8,906
Gain on acquisition	167,864	0	0
Litigation reserve	(2,775)	0	0
Impairment charges and loan losses	(4,262)	(35,946)	(6,879)
Income (loss) before benefit (provision) for income taxes, equity in earnings of non-consolidated entities and discontinued operations	158,266	(50,290)	(28,240)
Benefit (provision) for income taxes	(941)	845	(1,543)
Equity in earnings of non-consolidated entities	21,531	30,334	21,741
Income (loss) from continuing operations	178,856	(19,111)	(8,042)
Discontinued operations:
Income (loss) from discontinued operations	(1,463)	4,955	3,185
Provision for income taxes	(161)	(76)	(29)
Debt satisfaction gains (charges), net	(178)	(606)	2,924
Gains on sales of properties	13,291	6,557	14,613
Impairment charges	(5,707)	(81,497)	(50,061)
Total discontinued operations	5,782	(70,667)	(29,368)
Net income (loss)	184,638	(89,778)	(37,410)
Less net (income) loss attributable to noncontrolling interests	(4,322)	10,194	4,450
Net income (loss) attributable to Lexington Realty Trust shareholders	180,316	(79,584)	(32,960)
Dividends attributable to preferred shares
Allocation to participating securities	(1,059)	(368)	(264)
Net income (loss) attributable to common shareholders	156,849	(103,721)	(58,096)
Income (loss) per common share – basic:
Income (loss) from continuing operations	$ 0.96	$ (0.29)	$ (0.28)
Income (loss) from discontinued operations	$ 0.03	$ (0.39)	$ (0.16)
Net income (loss) attributable to common shareholders	$ 0.99	$ (0.68)	$ (0.44)
Weighted-average common shares outstanding – basic	159,109,424	152,473,336	130,985,809
Income (loss) per common share – diluted:
Income (loss) from continuing operations (USD per share)	$ 0.91	$ (0.29)	$ (0.28)
Income (loss) from discontinued operations (USD per share)	$ 0.02	$ (0.39)	$ (0.16)
Net income (loss) attributable to common shareholders (USD per share)	$ 0.93	$ (0.68)	$ (0.44)
Weighted-average common shares outstanding – diluted (shares)	179,659,826	152,473,336	130,985,809
Amounts attributable to common shareholders:
Income (loss) from continuing operations	152,808	(44,703)	(37,008)
Income (loss) from discontinued operations	4,041	(59,018)	(21,088)
Net income (loss) attributable to common shareholders	156,849	(103,721)	(58,096)
Series B
Dividends attributable to preferred shares
Dividends attributable to preferred shares	(2,298)	(6,149)	(6,360)
Deemed dividend – Series B	(2,346)	(95)	0
Series C
Dividends attributable to preferred shares
Dividends attributable to preferred shares	(6,290)	(6,655)	(6,809)
Redemption discount – Series C	229	833	0
Series D
Dividends attributable to preferred shares
Dividends attributable to preferred shares	$ (11,703)	$ (11,703)	$ (11,703)