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Derivative Instruments and Hedging Strategies - Summary of Derivatives Designated as and Not Designated as Hedging Instruments Outstanding (Detail) - Foreign exchange contracts - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Derivatives Designated As Hedging Instruments | Sell |  |
Derivative [Line Items] |  |
Notional amount | $ 654,516 | $ 782,327
Derivatives Designated As Hedging Instruments | Purchase |  |
Derivative [Line Items] |  |
Notional amount | 168,080 | 189,540
Not Designated as Hedging Instrument | Sell |  |
Derivative [Line Items] |  |
Notional amount | 77,040 | 98,343
Not Designated as Hedging Instrument | Purchase |  |
Derivative [Line Items] |  |
Notional amount | $ 37,285 | $ 12,277

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