Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Major Classes of Inventories

The major classes of inventories were as follows:

	December 31,
	2017			2016
	(In thousands)
Raw materials	$	133,311		$	90,019
Work-in-process	35,807			25,166
Finished goods	153,377			99,784
Gross inventories	322,495			214,969
Excess and obsolete reserves	(25,269		)	(24,561		)
Net inventories	$	297,226		$	190,408