Income Taxes Schedule of Components of Income Tax Benefit (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current tax expense (benefit):
Federal									$ 0	$ 0	$ 183
State									0	0	0
Deferred tax expense (benefit):
Federal									1,441	(3,440)	474
State									85	(1,922)	50
Change in valuation allowance									166	6,307	0
Income tax expense (benefit)	$ 658	$ 493	$ 541	$ 0	$ 638	$ (84)	$ 425	$ (34)	$ 1,692	$ 945	$ 707