Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2011

Discontinued Operations and Disposal Groups [Abstract]

Revenue and expense information for the property classified as discontinued operations

	Years ended December 31,
	2011			2010		2009
Revenue:
Rents	$	3,779		$	9,363	$	19,095
Tenant reimbursements	1,198			3,678		8,453
Termination fees	33			190		—
Other	(50		)	70		238
Total revenue	4,960			13,301		27,786
Expenses:
Property operating expenses	1,717			4,641		9,884
Real estate taxes	559			1,816		3,769
Depreciation and amortization	1,431			4,185		7,173
Total operating expenses	3,707			10,642		20,826
Income from discontinued operations before gain on sale of interests in real estate	1,253			2,659		6,960
Net gain on disposition of discontinued operations	7,264			11,011		1,241
Provision for impairment	—			—		(3,700		)
Income from discontinued operations	$	8,517		$	13,670	$	4,501