Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Notes To Financial Statements [Abstract]

Schedule of Inventory, Current

Inventories at September 30, 2017 and December 31, 2016 are as follows: 

	Sep 30, 2017		Dec 31, 2016
	(in thousands)
Raw materials and parts	$	180,323	$	154,647
Work-in-process	41,743		35,975
Finished goods	203,866		177,621
	$	425,932	$	368,243