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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
The components of inventories were as follows:
(in thousands)
December 31,
2019
 
December 31,
2018
Raw materials and supplies
$
87,675

 
$
71,068

Work-in-process
22,024

 
21,763

Finished goods
288,669

 
268,376

Inventories
$
398,368

 
$
361,207