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Advances to and Investments in Foreign Joint Venture Operations - Schedule of Investments in and Advances to Foreign Joint Venture Operations (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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BOMAY |  |
Schedule Of Equity Method Investments [Line Items] |  |
Accumulated statutory reserve in equity method investment | $ 2.8 | $ 2.8

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- Definition Equity method investment summarized financial information accumulated statutory reserve. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |