Annual report pursuant to Section 13 and 15(d)

Receivables, net (Details)

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Receivables, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Accounts receivable, net    
Gross customer accounts receivable $ 100,342 $ 105,737
Allowance for doubtful accounts (9,500) (8,658)
Customer accounts receivable, net 90,842 97,079
Receivables from distributors 121,410 98,498
Other receivables 29,475 27,452
Total receivables, net $ 241,727 $ 223,029