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Inventories
12 Months Ended
Dec. 31, 2019
Inventories [Abstract]  
Inventories
(6) Inventories


The following table presents the details of inventories as of December 31, 2019 and 2018 (in thousands):


 
2019
   
2018
 
Finished goods
 
$
291,214
   
$
406,364
 
Work in process
   
60,187
     
101,077
 
   
$
351,401
   
$
507,441