Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Deferred income tax (benefit) expense
Federal	$ (427)	$ (39)	$ (4,993)	$ (26)
State	(95)	(9)	(1,105)	(6)
Total deferred income tax (benefit) expense	(522)	(48)	(6,098)	(32)
Current income tax (benefit) expense
Federal	53	62	45	97
State	12	13	10	21
Total current income tax (benefit) expense	65	75	55	118
Total income tax expense (benefit)	(457)	27	(6,043)	86
Income tax expense
Reported on line entitled income tax expense (benefit)	(457)	27	(6,043)	75
Reported on line entitled gain on sale of real estate, net				11
Total income tax expense (benefit)	$ (457)	$ 27	$ (6,043)	$ 86
Combined Federal and state effective tax rate of taxable REIT subsidiary (as a percent)	38.60%	34.70%	38.60%	34.70%