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Income Taxes, Balances (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
State    
Income Tax Disclosure    
Income taxes receivable $ 1,199us-gaap_IncomeTaxesReceivable
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		  
Income taxes (payable)   (1,545)us-gaap_AccruedIncomeTaxesCurrent
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
Federal    
Income Tax Disclosure    
Income taxes receivable 73,510us-gaap_IncomeTaxesReceivable
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember		  
Income taxes (payable)   $ (32,351)us-gaap_AccruedIncomeTaxesCurrent
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember