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Inventories
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consist of the following (in thousands):
 
 
March 31, 2019
 
December 31, 2018
Raw materials
 
$
65,598

 
$
64,256

Work-in-process
 
10,586

 
15,211

Total
 
$
76,184

 
$
79,467