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Accounts Payable - Inventory Financing Facility - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounts Payable And Accrued Expenses [Line Items]        
Inventory financing facility maximum borrowing capacity   $ 325,000,000 $ 250,000,000  
Inventory financing facility maturity date   Jun. 23, 2021    
Imputed interest on inventory financing facility   $ 3,385,000 $ 3,406,000 $ 2,386,000
Inventory financing facility interest rate if balances are not paid within stated vendor terms   Prime plus 1.25%    
Inventory financing facility rate if vendor terms not met equal prime plus   1.25%    
Inventory Financing Facility [Member]        
Accounts Payable And Accrued Expenses [Line Items]        
Deferred financing fees capitalized $ 150,000      
Maximum [Member]        
Accounts Payable And Accrued Expenses [Line Items]        
Inventory financing facility additional borrowing capacity   $ 25,000,000