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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventories [Abstract]  
Inventories
 
 
December 31,
2019
   
December 31,
2018
 
 
 
(In thousands)
 
 
           
Finished goods
 
$
241,472
   
$
226,802
 
Work-in-process
   
11,138
     
10,527
 
Raw materials
   
115,611
     
112,482
 
Subtotal
   
368,221
     
349,811
 
Unreturned customer inventories
   
19,722
     
20,484
 
Total inventories
 
$
387,943
   
$
370,295