Inventories

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

INVENTORIES

NOTE F—INVENTORIES

At June 30, 2018 and December 31, 2017, inventories (in thousands) consisted of the following:

	June 30, 2018		December 31, 2017
Supplies	$	36,639	$	21,277
Raw materials and work in process	72,238		28,034
Finished goods	58,538		43,065
Total inventories	$	167,415	$	92,376