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Inventories
9 Months Ended
Sep. 30, 2021
Inventories [Abstract]  
Inventories
6.
Inventories
 
At September 30, 2021, and December 31, 2020, inventories included finished and in-process products totaling $263.8 million and $268.1 million, respectively, and raw materials and supplies of $128.4 million and $113.2 million, respectively.