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Income Taxes, Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]    
Income taxes receivable $ 74,791 $ 41,397
Federal
   
Income Tax Disclosure [Abstract]    
Income taxes receivable 73,525 39,656
State
   
Income Tax Disclosure [Abstract]    
Income taxes receivable $ 1,266 $ 1,741