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Advances to and Investments in Foreign Joint Ventures' Operations - Schedule of Activity in Investment in Foreign Joint Ventures (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Equity Method Investments |  |
Schedule Of Equity Method Investments [Line Items] |  |
Accumulated statutory reserves in equity method investments | $ 2,887 | $ 2,722

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