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Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Other assets |  |
Assets: |  |
Available-for-sale securities | $ 266 us-gaap_AvailableForSaleSecurities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember | $ 265 us-gaap_AvailableForSaleSecurities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember
Other Current Assets |  |
Assets: |  |
Derivative financial instruments | 644 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember | 118 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember
Fair Value Measurements, Level 1 | Other assets |  |
Assets: |  |
Available-for-sale securities | 266 us-gaap_AvailableForSaleSecurities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 265 us-gaap_AvailableForSaleSecurities / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Fair Value Measurements, Level 2 | Other Current Assets |  |
Assets: |  |
Derivative financial instruments | $ 644 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | $ 118 us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps. + References No definition available. + Details
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