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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of carrying values of inventories
 At March 31,At December 31,
(in thousands)
202220212021
Raw materials
$180,431 $94,340 $191,174 
In-process products
36,029 22,678 30,309 
Finished products
226,988 179,622 222,273 
 $443,448 $296,640 $443,756