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Inventories
 3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consist of the following:
(In thousands)March 31
2021		December 31
2020
Finished goods$10,467 $8,505 
Work-in-process7,846 16,522 
Raw materials and purchased parts121,883 117,789 
Stores and supplies31,391 30,197 
Total inventories$171,587 $173,013