Dispositions, Assets Held for Sale and Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Rental revenue		$ 3,018
Reimbursable income		328
Expenses:
Reimbursable expense		328
Interest expense		1,323
Other expenses		0
Depreciation and amortization		854
Income (loss) from discontinued operations, net	$ 0	$ 841