Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following (in thousands):

	September 30,		December 31,
	2018		2017
Raw material and subassemblies	$	219,699	$	210,615
Work-in-progress	52,228		47,400
Finished goods	104,615		114,168
	$	376,542	$	372,183