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Financial Instruments - Derivative Instruments Notional Amount Outstanding (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Forward Contracts [Member] |  |
Schedule Of Information By Major Category Of Credit Derivatives Contracts [Line Items] |  |
Derivative instruments outstanding | $ 460,758 | $ 585,581
Currency Swap [Member] |  |
Schedule Of Information By Major Category Of Credit Derivatives Contracts [Line Items] |  |
Derivative instruments outstanding | $ 600,000 | $ 600,000

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- Definition Schedule Of Information By Major Category Of Credit Derivatives Contracts [Line Items] + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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- Details
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