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Commitments and Contingencies (Letters of Credit) - Additional Information (Detail) $ in Millions | Dec. 31, 2016 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Letters of credit and bank guarantees under the credit facility | $ 305.6

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant