Investments in Real Estate and Real Estate Under Construction (Tables)

3 Months Ended

Mar. 31, 2013

Investments in Real Estate and Real Estate Under Construction [Abstract]

Schedule of Acquired Properties [Table Text Block]

The Company, through property owner subsidiaries, completed the following acquisition and build-to-suit transactions during the three months ended March 31, 2013:

Property Type	Location	Acquisition/Completion Date	Initial Cost Basis		Lease Expiration	Land and Land Estate		Building and Improvements		Lease in-place Value Intangible
Industrial	Long Island City, NY	February 2013	$	41,872	03/2028	$	—	$	41,872	$	—
Industrial	Houston, TX	March 2013	$	81,400	03/2038	$	15,055	$	57,949	$	8,396
			$	123,272		$	15,055	$	99,821	$	8,396

Schedule of Acquisition Development and Construction Arrangements Outstanding [Table Text Block]

As of March 31, 2013, the Company had the following development arrangements outstanding:

Location	Property Type	Square Feet	Expected Maximum Commitment/Contribution ($ millions)		Lease Term (Years)	Estimated Completion Date
Denver, CO	Office	167,000	$	39.0	15	2Q 13
Tuscaloosa, AL	Retail	42,000	$	8.8	15	3Q 13
Rantoul, IL	Industrial	813,000	$	42.6	20	4Q 13
Bingen, WA(1)	Industrial	124,000	$	20.8	10-20	2Q 14
		1,146,000	$	111.2

(1) Commitment may be terminated by the tenant prior to the commencement of construction.

Business Acquisition, Pro Forma Information [Table Text Block]

The information presented below is not necessarily indicative of what the actual results of operations would have been had the transaction been completed on January 1, 2012, nor does it purport to represent the Company's future operations:

	Three Months Ended March 31, 2012
Gross revenues	$	89,674
Net loss attributable to Lexington Realty Trust shareholders	$	(4,844	)
Net loss attributable to common shareholders	$	(10,642	)
Net loss per common share - basic and diluted	$	(0.07	)