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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Current Income Tax Expense (Benefit) [Abstract]      
Federal $ 0 $ 0 $ (4)
State 7 1 22
Current Income Tax Expense (Benefit) 7 1 18
Deferred Income Tax Expense (Benefit) [Abstract]      
Federal 20 19 36
State 3 7 17
Deferred Income Tax Expense (Benefit) 23 26 53
Income Tax Expense (Benefit) $ 30 $ 27 $ 71