Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following:

	(In thousands)
	March 31, 2018		December 31, 2017
Raw materials and supplies	$	72,986	$	65,221
Work in process	10,894		62,584
Finished goods	2,052		10,665
	85,932		138,470
Less progress payments	—		16,309
Total	$	85,932	$	122,161