Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following (in thousands):

	March 31,		December 31,
	2019		2018
Raw material and subassemblies	$	218,651	$	214,164
Work-in-progress	52,748		43,096
Finished goods	113,917		94,847
	$	385,316	$	352,107