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Income Taxes Provision for Taxes (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                 $ 0us-gaap_CurrentFederalTaxExpenseBenefit $ 0us-gaap_CurrentFederalTaxExpenseBenefit $ 0us-gaap_CurrentFederalTaxExpenseBenefit
State taxes                 289us-gaap_CurrentStateAndLocalTaxExpenseBenefit 113us-gaap_CurrentStateAndLocalTaxExpenseBenefit 281us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign taxes                 5,359us-gaap_CurrentForeignTaxExpenseBenefit 4,405us-gaap_CurrentForeignTaxExpenseBenefit 11,890us-gaap_CurrentForeignTaxExpenseBenefit
Total current                 5,648us-gaap_CurrentIncomeTaxExpenseBenefit 4,518us-gaap_CurrentIncomeTaxExpenseBenefit 12,171us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:                      
Federal                 (1,867)us-gaap_DeferredFederalIncomeTaxExpenseBenefit (26,151)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 10,085us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State taxes                 131us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (325)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (196)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Total deferred                 (1,736)us-gaap_DeferredIncomeTaxExpenseBenefit (26,476)us-gaap_DeferredIncomeTaxExpenseBenefit 9,889us-gaap_DeferredIncomeTaxExpenseBenefit
(Provision) benefit for income taxes $ 450us-gaap_IncomeTaxExpenseBenefit $ 145us-gaap_IncomeTaxExpenseBenefit $ 4,689us-gaap_IncomeTaxExpenseBenefit $ (1,372)us-gaap_IncomeTaxExpenseBenefit $ 3,390us-gaap_IncomeTaxExpenseBenefit $ (19,570)us-gaap_IncomeTaxExpenseBenefit $ (9,050)us-gaap_IncomeTaxExpenseBenefit $ 3,272us-gaap_IncomeTaxExpenseBenefit $ 3,912us-gaap_IncomeTaxExpenseBenefit $ (21,958)us-gaap_IncomeTaxExpenseBenefit $ 22,060us-gaap_IncomeTaxExpenseBenefit