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Inventories (Inventories) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventories [Abstract]    
Raw materials $ 80,265 $ 77,836
Work in process 49,717 42,093
Finished goods 134,640 125,842
Total inventories $ 264,622 $ 245,771