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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
INVENTORIES    
Raw materials $ 165,058 $ 160,809
Work-in-process 146,975 125,756
Finished goods 300,379 276,299
Total $ 612,412 $ 562,864
Percentage of total inventories valued using the LIFO method (as a percent) 33.00% 37.00%
Excess of current cost over LIFO cost $ 125,975 $ 129,946