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Derivative Instruments and Hedging Activities - Open Foreign Currency Contracts (Detail) - Cash Flow Hedging - Foreign exchange contracts, net - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Derivative [Line Items] |  |
Notional Amounts (in U.S. dollars) | $ 209,300 | $ 134,400
Net Unrealized Gain (Loss) | (2,300) | (100)
Australian Dollar |  |
Derivative [Line Items] |  |
Notional Amounts (in U.S. dollars) | 26,000 | 16,000
Net Unrealized Gain (Loss) | (500) | (100)
Canadian Dollar |  |
Derivative [Line Items] |  |
Notional Amounts (in U.S. dollars) | 169,800 | 101,400
Net Unrealized Gain (Loss) | (2,800) | (1,100)
Mexican Peso |  |
Derivative [Line Items] |  |
Notional Amounts (in U.S. dollars) | 13,500 | 17,000
Net Unrealized Gain (Loss) | $ 1,000 | $ 1,100

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