Real Estate Properties (Tables)

12 Months Ended

Dec. 31, 2011

Real Estate Properties

Summary of balance sheet information for all properties classified as held for sale

	December 31, 2010
Real estate properties	$	105,291
Acquired real estate leases		1,104
Rents receivable		4,446
Other assets, net		3,585
Properties held for sale		114,426
Assumed real estate lease obligations	$	7
Rent collected in advance		1,187
Security deposits		298
Liabilities related to properties held for sale	$	1,492

Summary of income statement information for properties sold or held for sale, other than for properties sold to GOV

	Year Ended December 31,
	2011			2010			2009
Rental income	$	20,460		$	80,973		$	97,222
Operating expenses		(9,726	)		(31,802	)		(34,596	)
Depreciation and amortization		(4,463	)		(16,323	)		(17,647	)
General and administrative		(722	)		(2,834	)		(3,268	)
Acquisition related costs		(128	)		(7	)		(216	)
Operating income		5,421			30,007			41,495
Interest income		2			7			2
Interest expense		—			(3,791	)		(6,603	)
Income from discontinued operations	$	5,423		$	26,223		$	34,894

Schedule of future minimum lease payments receivable

2012	$	746,467
2013		685,860
2014		625,785
2015		566,948
2016		476,837
Thereafter		2,157,646
	$	5,259,543

Schedule of future minimum lease payments

2012	$	1,456
2013		1,461
2014		1,477
2015		1,477
2016		1,477
Thereafter		134,456
	$	141,804