Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Current - Federal	$ (8,401)	$ 9,204	$ 25,353
- State	(43)	2,094	3,807
Deferred - Federal	(5,914)	(3,234)	(21,092)
- State	(2,594)	(694)	(3,108)
Income tax expense (benefit)	$ (16,952)	$ 7,370	$ 4,960