Inventories (Tables)

9 Months Ended

Sep. 30, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Components of inventories as of September 30, 2021 and December 31, 2020 are as follows: 

	September 30, 2021		December 31, 2020
	(In Thousands)
Finished goods	$	62,510	$	68,121
Raw materials	3,604		2,910
Parts and supplies	4,524		4,001
Work in progress	1,648		1,626
Total inventories	$	72,286	$	76,658