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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories are summarized below (in thousands):
 
March 31,
2020
 
December 31, 2019
Inventories:
 
 
 
Raw materials
$
75,823

 
$
76,140

Work-in-process
1,079

 
860

Finished goods
335,788

 
379,639

 
$
412,690

 
$
456,639