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Derivative Instruments - Derivatives Not Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) - Not Designated As Hedging Instrument - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments | $ 70,711 | $ (9,425) | $ (46,656)
Foreign currency forward exchange contracts | Other non-operating expense/income, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments | 70,200 | (11,056) | (51,679)
Foreign currency forward exchange contracts | Cost of sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments | 511 | 1,631 | (265)
Cross currency swap contract | Other non-operating expense/income, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments | $ 0 | $ 0 | $ 5,288

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying 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 + Details
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