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	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Percentage of taxable income required to be distributed to shareholders			90.00%
State tax expense	$ 1,045	$ 1,084	$ 3,090	$ 3,348
Income tax provision (benefit)	4,653	(1,264)	(1,770)	(5,052)
Current portion of income tax provision (benefit)	4,759	928	3,262	(7,927)
Deferred portion of income tax provision (benefit)	(106)	336	(5,032)	2,245
Deferred tax asset	5,904		5,904		7,074
Deferred tax liability					$ 2,941