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INVENTORIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
INVENTORIES    
Raw materials $ 179,412 $ 143,394
Work-in-process 111,748 97,834
Finished goods 348,233 298,691
Total $ 639,393 $ 539,919
Percentage of total inventories valued using the LIFO method (as a percent) 37.00% 36.00%
Excess of current cost over LIFO cost $ 131,488 $ 114,176