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Derivatives - Summary of Losses on Derivatives Not Designated as Cash Flow Hedging Instruments (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Forward Exchange Contracts [Member] |  |
Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items] |  |
Net loss recognized in income | $ (1,253) | $ (1,463)

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- Definition Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items] + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as 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 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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- Details
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