Inventories (Tables)

3 Months Ended

Mar. 31, 2022

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consist of the following:

(In thousands)	March 31 2022		December 31 2021
Finished goods	$	7,856	$	8,323
Work-in-process	5,963		5,393
Raw materials and purchased parts	22,276		21,188
Stores and supplies	40,759		35,589
Total inventories	$	76,854	$	70,493