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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories are summarized below (in thousands):
 
September 30,
2019
 
December 31, 2018
Inventories:
 
 
 
Raw materials
$
60,693

 
$
80,474

Work-in-process
1,039

 
815

Finished goods
278,582

 
256,768

 
$
340,314

 
$
338,057