Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2011

Discontinued Operations and Disposal Groups [Abstract]

Operations Classified As Discontinued Operations

The following table sets forth our operations which required classification as discontinued operations:

	Year Ended December 31,
	2011		2010			2009
Rental and other revenues	$	1,593	$	3,627		$	11,292
Operating expenses:
Rental property and other expenses	570		1,406			4,263
Depreciation and amortization	127		744			2,231
Impairment of assets held for use	—		—			10,964
Total operating expenses	697		2,150			17,458
Interest expense	—		—			67
Other income	1		2			3
Income/(loss) from discontinued operations	897		1,479			(6,230		)
Net gains/(losses) on disposition of discontinued operations	2,573		(86		)	21,466
Total discontinued operations	$	3,470	$	1,393		$	15,236
Carrying value of assets held for sale and assets sold that qualified for discontinued operations during the year	$	15,261	$	42,133		$	97,457

Major Classes of Assets and Liabilities of the Properties Classified As Held For Sale

The following table sets forth the major classes of assets and liabilities of the properties held for sale:

	December 31,
	2011		2010
Assets:
Land	$	—	$	2,788
Buildings and tenant improvements	—		12,707
Land held for development	—		4,536
Accumulated depreciation	—		(5,012		)
Net real estate assets	—		15,019
Accrued straight line rents receivable	—		57
Deferred leasing costs, net	—		257
Prepaid expenses and other assets	—		43
Real estate and other assets, net, held for sale	$	—	$	15,376
Tenant security deposits, deferred rents and accrued costs (1)	$	—	$	11

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(1) Included in accounts payable, accrued expenses and other liabilities.