Annual report pursuant to Section 13 and 15(d)

Accrued Expenses - Summary of Accrued Expenses (Detail)

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Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables And Accruals [Abstract]    
Accrued inventory purchases $ 20,509 $ 48,087
Accrued payroll and taxes 61,693 45,337
Accrued expenses $ 82,202 $ 93,424