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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories consist of the following at December 31:
 
 
2018
 
2017
Raw materials
$
45,898

 
$
41,844

Work in process
15,000

 
14,666

Finished goods
93,701

 
84,926

 
$
154,599

 
$
141,436