Annual report pursuant to Section 13 and 15(d)

Inventories - Summary of Inventories (Details)

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Inventories - Summary of Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Finished Goods $ 33,434 $ 33,100
Work in Progress 25,594 27,409
Raw Material 86,759 78,176
Total Inventory $ 145,787 $ 138,685