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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Derivatives, Fair Value [Line Items] |  |
Forward exchange contracts, assets | $ 1,966 us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue | $ 920 us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue
Forward exchange contracts, liabilities |  | (656)us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue
Total net derivative asset designated as hedging instruments | 1,966 us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet | 264 us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet
Derivatives Designated as Hedging Instruments [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Forward exchange contracts, assets | 1,966 us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 920 us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Forward exchange contracts, liabilities |  | (656)us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Total net derivative asset designated as hedging instruments | $ 1,966 us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | $ 264 us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember

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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivatives designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(b),(c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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