Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Percentage of taxable income required to be distributed to shareholders			90.00%
State tax expense	$ 957	$ 1,045	$ 2,514	$ 3,090
Income tax provision (benefit)	1,195	4,653	1,234	(1,770)
Current portion of income tax provision (benefit)	(171)	(4,759)	(2,447)	3,262
Deferred portion of income tax provision (benefit)	1,366	106	3,681	(5,032)
Deferred tax asset	$ 6,777		$ 6,777		$ 8,012