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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current:                      
Federal                 $ (20,824)us-gaap_CurrentFederalTaxExpenseBenefit $ 58,507us-gaap_CurrentFederalTaxExpenseBenefit $ 10,621us-gaap_CurrentFederalTaxExpenseBenefit
State                 (403)us-gaap_CurrentStateAndLocalTaxExpenseBenefit 14,691us-gaap_CurrentStateAndLocalTaxExpenseBenefit (759)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign                 9,195us-gaap_CurrentForeignTaxExpenseBenefit 15,545us-gaap_CurrentForeignTaxExpenseBenefit 2,968us-gaap_CurrentForeignTaxExpenseBenefit
Current Income Tax Expense (Benefit)                 (12,032)us-gaap_CurrentIncomeTaxExpenseBenefit 88,743us-gaap_CurrentIncomeTaxExpenseBenefit 12,830us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:                      
Federal                 41,986us-gaap_DeferredFederalIncomeTaxExpenseBenefit (53,711)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 62,704us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State                 (997)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (4,325)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (431)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign                 (6,162)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (4,410)us-gaap_DeferredForeignIncomeTaxExpenseBenefit 1,482us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Provision for valuation allowance on deferred tax assets                 3,601us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 15,764us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 0us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Deferred Income Tax Expense (Benefit)                 38,428us-gaap_DeferredIncomeTaxExpenseBenefit (46,682)us-gaap_DeferredIncomeTaxExpenseBenefit 63,755us-gaap_DeferredIncomeTaxExpenseBenefit
Total $ 2,022us-gaap_IncomeTaxExpenseBenefit $ 2,992us-gaap_IncomeTaxExpenseBenefit $ 10,165us-gaap_IncomeTaxExpenseBenefit $ 11,217us-gaap_IncomeTaxExpenseBenefit $ 18,309us-gaap_IncomeTaxExpenseBenefit $ 8,873us-gaap_IncomeTaxExpenseBenefit $ 8,496us-gaap_IncomeTaxExpenseBenefit $ 6,383us-gaap_IncomeTaxExpenseBenefit $ 26,396us-gaap_IncomeTaxExpenseBenefit $ 42,061us-gaap_IncomeTaxExpenseBenefit $ 76,585us-gaap_IncomeTaxExpenseBenefit