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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule Of Inventories
 December 31,
(in thousands)
20202019
Finished goods and work-in-process$325,588 $295,997 
Raw materials59,413 55,702 
Stores, supplies, and other16,030 14,239 
$401,031 $365,938