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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following (in thousands):
 
June 30,
 
December 31,
 
2020
 
2019
Raw material and subassemblies
$
239,092

 
$
224,239

Work-in-progress
62,108

 
44,344

Finished goods
132,708

 
120,179

 
$
433,908

 
$
388,762