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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories are summarized below (in thousands):
 
June 30,
2020
 
December 31, 2019
Inventories:
 
 
 
Raw materials
$
69,959

 
$
76,140

Work-in-process
997

 
860

Finished goods
308,213

 
379,639

 
$
379,169

 
$
456,639