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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 108,961 $ 124,171
Work-in-process 75,913 65,392
Finished goods 170,029 138,302
Total 354,903 327,865
Long-term inventory 34,600 29,000
Inventories not yet available for sale $ 39,000 $ 17,600