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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Derivatives, Fair Value [Line Items] |  |
Derivative asset classified in other current assets |  | $ 168
Derivative liability classified in other current liabilities |  | (6,198)
Foreign Exchange Contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset classified in other current assets | $ 3,666 |
Derivative liability classified in other current liabilities | (822) |
Interest Rate Hedge [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset classified in other current assets | $ 8,565 | $ 6,179

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