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Inventories (Schedule of Inventories) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventories [Abstract]    
Raw materials $ 61,387 $ 54,382
Work-in-progress 6,674 4,710
Finished goods 35,536 20,186
Total inventories, net $ 103,597 $ 79,278