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Accounts Receivable, net
 9 Months Ended
Sep. 30, 2015
Receivables [Abstract]  
Accounts Receivable, net
Accounts Receivable, net
Accounts receivable, net, consists of the following: 
 
September 30,
2015
 
December 31,
2014
 
(in thousands)
Accounts receivable, gross
$
40,675

 
$
34,790

Less allowance for doubtful accounts
(1,235
)
 
(1,172
)
Total accounts receivable, net
$
39,440

 
$
33,618