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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Quarters
Sep. 30, 2011
Income Tax Disclosure [Abstract]        
Provision for federal income taxes $ 1,381,000 $ (3,334,000) $ 3,367,000 $ (2,332,000)
Effective income tax rate 41.00% 37.00% 31.00% 52.00%
Number of Calendar Quarters     2  
Payment of civil money penalty 1,500,000      
Federal statutory income tax rate 34.00% 34.00% 34.00% 34.00%
Deferred tax asset $ 3,000,000   $ 3,000,000