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Summary of Effects of Interest Rate Swap Agreements and Foreign Currency Foreign Exchange Contracts on Result of Operations (Parenthetical) (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Interest Expense, Net | Designated As Hedging Instrument | Cash Flow Hedging | Interest Rate Swap |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain reclassified out of AOCI into interest expenses | $ 0 | $ 456,000 | $ 0 | $ 3,400,000

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