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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories at December 31 are as follows:
(In thousands)20202019
Finished Goods$26,964 $33,434 
Work in Progress21,987 25,594 
Raw Material108,108 86,759 
Total Inventories$157,059 $145,787