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Inventories (Inventories) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventories [Abstract]    
Raw materials $ 84,417 $ 80,176
Work in process 50,548 49,717
Finished goods 137,832 134,583
Total inventories $ 272,797 $ 264,476