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Derivatives - Summary of (Losses) and Gains on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Forward Exchange Contracts [Member] |  |  |  |
Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items] |  |  |  |
Net (loss) gain recognized in income | $ (339) | $ 116 | $ (1,283) | $ 1,331
Foreign Currency Option Contracts [Member] |  |  |  |
Derivative Instruments Gain Loss Not Designated As Hedging Instruments [Line Items] |  |  |  |
Net (loss) gain recognized in income | $ (63) |  | $ 52 |

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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=64837297&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=64837297&loc=SL5618551-113959 + Details
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