Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory, Net [Abstract]

Schedule of Inventory, Current

The components of inventories are as follows:

	March 31,		December 31,
(In thousands)	2018		2017
Finished goods	$	24,154	$	20,281
Work-in-process	10,615		11,958
Raw materials	31,089		35,909
Stores, supplies and other	19,500		18,759
Total	$	85,358	$	86,907