Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2012

Discontinued Operations and Disposal Groups [Abstract]

Revenue and expenses information for the property classified as discontinued operations

	Three-month period ended June 30, 2012		Six-month period ended June 30, 2012
Revenue:
Rents	$	2,003	$	6,113
Tenant reimbursements	343		758
Termination fees	—		7
Other	86		89
Total revenue	2,432		6,967
Expenses:
Property operating expenses	594		1,701
Real estate taxes	217		726
Depreciation and amortization	840		2,744
Total operating expenses	1,651		5,171
Other income (expense):
Interest income	2		2
Income from discontinued operations before gain on sale of interests in real estate	783		1,798
Net gain on disposition of discontinued operations	10,166		24,834
Income from discontinued operations	$	10,949	$	26,632

	Three-month period ended June 30, 2011		Six-month period ended June 30, 2011
Revenue:
Rents	$	5,620	$	11,292
Tenant reimbursements	750		1,931
Other	5		2
Total revenue	6,375		13,225
Expenses:
Property operating expenses	1,581		3,639
Real estate taxes	707		1,446
Depreciation and amortization	2,344		4,561
Total operating expenses	4,632		9,646
Income from discontinued operations before gain on sale of interests in real estate	1,743		3,579
Net gain on disposition of discontinued operations	3,836		3,836
Income from discontinued operations	$	5,579	$	7,415

Disclosure of Long Lived Assets Held-for-sale [Table Text Block]

	June 30,
	2012
Real Estate Investments:
Operating properties	$	52,990
Accumulated depreciation	(14,385		)
	38,605
Construction-in-progress	36
	38,641
Receivables	1,374
Deferred costs, net	1,137
Other assets	298
Total assets held for sale	$	41,450
Liabilities held for sale	$	878