Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

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

	June 30, 2021		December 31, 2020
	(In Thousands)
Finished goods	$	59,814	$	68,121
Raw materials	3,783		2,910
Parts and supplies	4,554		4,001
Work in progress	1,920		1,626
Total inventories	$	70,071	$	76,658