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Inventories (Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Inventories [Abstract]    
Raw materials $ 81,344 $ 80,176
Work in process 48,770 49,717
Finished goods 130,218 134,583
Total inventories $ 260,332 $ 264,476