Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Operations Classified As Discontinued Operations [Table Text Block]

The following table sets forth our operations classified as discontinued operations:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013			2012
Rental and other revenues	$	2,810	$	5,671	$	10,398		$	24,211
Operating expenses:
Rental property and other expenses	1,049		1,622		3,389			7,796
Depreciation and amortization	665		1,610		3,166			7,108
Total operating expenses	1,714		3,232		6,555			14,904
Interest expense	—		35		—			283
Income from discontinued operations	1,096		2,404		3,843			9,024
Impairments of real estate assets	—		—		(2,194		)	—
Net gains on disposition of discontinued operations	37,946		22,936		52,353			29,455
Total discontinued operations	$	39,042	$	25,340	$	54,002		$	38,479

Major Classes of Assets and Liabilities of the Properties Classified As Held For Sale [Table Text Block]

The following table sets forth the major classes of assets of our real estate and other assets, net, held for sale:

	September 30, 2013			December 31, 2012
Assets:
Land	$	1,948		$	28,598
Buildings and tenant improvements	18,498			132,361
Land held for development	—			2,368
Less-accumulated depreciation	(5,931		)	(43,730		)
Net real estate assets	14,515			119,597
Accrued straight-line rents receivable, net	1,187			5,759
Deferred leasing costs, net	614			4,014
Prepaid expenses and other assets	—			30
Real estate and other assets, net, held for sale	$	16,316		$	129,400