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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory, Net [Abstract]  
Schedule of components of inventories The components of inventories were as follows:
(in thousands)June 30, 2020December 31, 2019
  
Raw materials$49,129  $41,202  
Work-in-process20,314  20,077  
Finished goods159,934  133,740  
Inventories$229,377  $195,019