Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following (in thousands):

	December 31,
	2018		2017
Raw material and subassemblies	$	214,164	$	210,615
Work-in-progress	43,096		47,400
Finished goods	94,847		114,168
	$	352,107	$	372,183