Income Taxes (Components of Income tax expense (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 Income Tax Expense (Benefit) [Abstract]
Federal									$ 0	$ 0	$ 0
State									(8)	0	0
Current income taxes (benefit)									(8)	0	0
Deferred Income Tax Expense (Benefit) [Abstract]
Federal									0	(123)	(8,468)
State									0	(29)	(1,180)
Total deferred income tax (benefit)									0	(152)	(9,649)
Deferred tax asset valuation allowance									0	0	8,766
Total income tax provision (benefit)	$ (8)	$ 0	$ 0	$ 0	$ (152)	$ 0	$ 0	$ 0	$ (8)	$ (152)	$ (882)