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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Accounts Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]    
Accounts receivable trade $ 53,525 $ 43,622
Accrued ship and debit and rebate claims (41,824) (35,486)
Allowance for doubtful accounts (407) (318)
Total $ 11,294 $ 7,818