XML 66 R49.htm IDEA: XBRL DOCUMENT v3.21.1
INVENTORIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
INVENTORY    
Raw materials $ 115,278 $ 111,888
Work-in-process 67,097 60,341
Finished goods 233,526 209,029
Inventories, net $ 415,901 $ 381,258
Percentage of total inventories valued using the LIFO method (as a percent) 36.00% 35.00%
Excess of current cost over LIFO cost $ 79,435 $ 75,581