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Inventories (Tables)
 6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventory Net inventories consist of the following:
(in thousands)
June 30, 2019December 31, 2018
Finished goods
$172,577 $149,298 
Work in process
18,192 12,732 
Raw materials
15,141 14,600 
Inventories, net$205,910 $176,630