Quarterly report pursuant to Section 13 or 15(d)

Receivables, net (Details)

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Receivables, net (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Accounts receivable, net    
Gross customer accounts receivable $ 105,764 $ 100,342
Allowance for doubtful accounts (8,302) (9,500)
Customer accounts receivable, net 97,462 90,842
Receivables from distributors 121,407 121,410
Other receivables 28,279 29,475
Total receivables, net $ 247,148 $ 241,727