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v2.4.1.9

Condensed Consolidating Financial Information - Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 110,073 us-gaap_NetIncomeLoss | $ 6,920 us-gaap_NetIncomeLoss | $ 47,852 us-gaap_NetIncomeLoss | $ 82,558 us-gaap_NetIncomeLoss | $ 24,278 us-gaap_NetIncomeLoss | $ 40,527 us-gaap_NetIncomeLoss | $ 43,828 us-gaap_NetIncomeLoss | $ 44,559 us-gaap_NetIncomeLoss | $ 247,403 us-gaap_NetIncomeLoss |  | $ 153,192 us-gaap_NetIncomeLoss |  | $ 68,371 us-gaap_NetIncomeLoss |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | (16,894)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |  | (12,223)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |  | 1,355 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |
Change in fair value of derivative instruments, net of taxes |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1] | (4,419)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1] | (8,452)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1]
Reclassification of settled contracts, net of taxes |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax | [2] | 10,290 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax | [2] | 1,005 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax | [2]
Other comprehensive loss |  |  |  |  |  |  |  |  | (16,894)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  | (6,352)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  | (6,092)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |
Comprehensive income |  |  |  |  |  |  |  |  | 230,509 us-gaap_ComprehensiveIncomeNetOfTax |  | 146,840 us-gaap_ComprehensiveIncomeNetOfTax |  | 62,279 us-gaap_ComprehensiveIncomeNetOfTax |
Parent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 247,403 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 153,192 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 68,371 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | (16,894)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (12,223)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 1,355 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Change in fair value of derivative instruments, net of taxes |  |  |  |  |  |  |  |  |  |  | (4,419)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (8,452)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Reclassification of settled contracts, net of taxes |  |  |  |  |  |  |  |  |  |  | 10,290 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 1,005 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Other comprehensive loss |  |  |  |  |  |  |  |  | (16,894)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (6,352)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (6,092)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Comprehensive income |  |  |  |  |  |  |  |  | 230,509 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 146,840 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 62,279 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Guarantor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 529 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 508 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | (3,066)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Change in fair value of derivative instruments, net of taxes |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Reclassification of settled contracts, net of taxes |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Other comprehensive loss |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Comprehensive income |  |  |  |  |  |  |  |  | 529 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | 508 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  | (3,066)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Non-Guarantor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | (13,157)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (3,000)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (1,586)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | (16,894)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (12,223)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 1,355 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Change in fair value of derivative instruments, net of taxes |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Reclassification of settled contracts, net of taxes |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Other comprehensive loss |  |  |  |  |  |  |  |  | (16,894)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (12,223)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 1,355 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Comprehensive income |  |  |  |  |  |  |  |  | (30,051)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (15,223)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (231)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 12,628 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 2,492 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 4,652 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | 16,894 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 12,223 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (1,355)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |
Change in fair value of derivative instruments, net of taxes |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |
Reclassification of settled contracts, net of taxes |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |
Other comprehensive loss |  |  |  |  |  |  |  |  | 16,894 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 12,223 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (1,355)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |
Comprehensive income |  |  |  |  |  |  |  |  | $ 29,522 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | $ 14,715 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | $ 3,297 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |
[1] | Net of $4.3 million and $(4.3) million in taxes for the years ended December 31, 2013 and 2012, respectively. No taxes were recorded in the year ended 2014.
[2] | Net of $(0.5) million and $0.5 million in taxes for the years ended December 31, 2013 and 2012, respectively. No taxes were recorded in the year ended 2014.

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