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Inventories
 6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
The components of inventories as of June 30, 2020 and December 31, 2019 were:
June 30,
2020		December 31,
2019
Raw materials and component parts$188,848  $182,382  
Work in process38,803  28,761  
Finished goods97,280  82,324  
Total inventories$324,931  $293,467  

Inventories are stated at the lower of cost or net realizable value. Cost, which includes material, labor and factory overhead, is determined on a first in, first out basis.