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, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Accrued inventory purchases $ 40,493 $ 20,509
Accrued payroll and taxes 72,822 61,693
Return reserve liability 48,466  
Accrued expenses $ 161,781 $ 82,202