Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Results for discontinued operations
Revenues	$ 1,059	$ 265	$ 1,082
Gain on sale of investments in real estate	945	392
Settlement income	592	5,868
Operating expenses	(765)	(227)	(109)
Depreciation and amortization	(400)	(2)	(155)
Impairment loss	(698)		(2,720)
Interest expense	(800)
Income (loss) from discontinued operations	$ (67)	$ 655	$ (1,741)