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Inventories
9 Months Ended
Sep. 30, 2018
Inventories [Abstract]  
Inventories
 5.
Inventories

At September 30, 2018, and December 31, 2017, inventories included finished and in-process products totaling $324.7 million and $310.4 million, respectively, and raw materials and supplies of $160.1 million and $153.1 million, respectively.