Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Percentage of taxable income required to be distributed to shareholders			90.00%
State tax expense	$ 1,094	$ 1,242	$ 1,571	$ 2,046
Income tax provision (benefit)	267	(4,653)	39	(6,423)
Current portion of income tax provision (benefit)	774	(14)	(2,277)	(1,498)
Deferred portion of income tax provision (benefit)	(507)	4,667	2,316	(4,925)
Deferred tax asset	$ 7,972		$ 7,972		$ 8,012