Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following:

	(In thousands)
	June 30, 2018		December 31, 2017
Raw materials and supplies	$	80,985	$	65,221
Work in process	11,815		62,584
Finished goods	2,444		10,665
	95,244		138,470
Less progress payments	—		16,309
Total	$	95,244	$	122,161