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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Components Of Inventories
Components of inventories at December 31, 2020 and 2019 are summarized as follows:
(in thousands)20202019
Raw materials$23,762 $42,066 
Work in process5,912 5,496 
Finished goods and parts86,993 63,544 
Inventories$116,667 $111,106