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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income Taxes (Textual) [Abstract]        
Tax Benefit $ (1,116,000) $ 3,589,000 $ (6,094,000) $ 18,311,000
Effective income tax rate   30.50%   33.00%
U.S federal Statutory rate     34.00%  
Income tax benefits related to recording unrecognized state tax     $ 424,000