Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Components of Inventories

The components of inventories as of March 31, 2019 and December 31, 2018 were:

	March 31, 2019		December 31, 2018
Raw materials and component parts	$	187,299	$	178,805
Work in process	44,780		37,495
Finished goods	66,248		63,695
Total inventories	$	298,327	$	279,995