Inventories (Tables)

6 Months Ended

Jun. 28, 2019

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories on the Consolidated Balance Sheets are summarized as follows:

	June 28,		December 31,
(Thousands)	2019		2018
Raw materials and supplies	$	38,425	$	33,182
Work in process	190,428		195,879
Finished goods	32,062		30,643
Subtotal	$	260,915	$	259,704
Less: LIFO reserve balance	47,586		44,833
Inventories	$	213,329	$	214,871