XML 31 R21.htm IDEA: XBRL DOCUMENT v3.5.0.2
Trade Accounts Receivable, Net (Tables)
 9 Months Ended
Sep. 30, 2016
Receivables [Abstract]  
Schedule of trade accounts receivable, net
Trade accounts receivable at the dates indicated consisted of the following: 
 
At September 30,
 
At December 31,
(in thousands)
2016
 
2015
 
2015
Trade accounts receivable
$
145,966

 
$
136,748

 
$
109,859

Allowance for doubtful accounts
(945
)
 
(919
)
 
(1,142
)
Allowance for sales discounts and returns
(3,305
)
 
(3,102
)
 
(2,706
)
 
$
141,716

 
$
132,727

 
$
106,011