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Debt (Additional Information) (Detail)
$ in Thousands
Sep. 30, 2017
USD ($)
Revolving Loan Facility  
Debt Instrument [Line Items]  
Remaining capacity under senior secured credit facility $ 784,117
Maximum borrowing capacity under revolving credit facility 1,000,000
Trade letters of credit issued 4,883
European Revolving Loan Facility  
Debt Instrument [Line Items]  
Remaining capacity under senior secured credit facility 37,586
Australian Revolving Facility  
Debt Instrument [Line Items]  
Remaining capacity under senior secured credit facility 51,016
Accounts Receivable Securitization Facility  
Debt Instrument [Line Items]  
Remaining capacity under senior secured credit facility 24,005
Other International Debt  
Debt Instrument [Line Items]  
Remaining capacity under senior secured credit facility $ 60,648