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Inventories (Tables)
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of inventories Inventories consist of the following:
(In thousands)December 31
2022
December 31
2021
Finished goods$11,809 $8,323 
Work-in-process4,241 5,393 
Raw materials and purchased parts25,735 21,188 
Stores and supplies39,590 35,589 
Total inventories$81,375 $70,493 
Valued at lower of cost or market:  
LIFO basis$15,473 $14,133 
FIFO basis8,826 7,567 
Average cost basis57,076 48,793 
Total inventories$81,375 $70,493