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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories at December 31 consisted of:

 
 
2018
 
2017
Finished goods
 
$
87,779

 
$
79,649

Work-in-process
 
98,426

 
97,276

Raw materials and supplies
 
79,785

 
65,037

 
 
$
265,990

 
$
241,962