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Inventories
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consisted of the following: 
June 30, 2022June 30, 2021Dec. 31, 2021
 (Dollars in thousands)
Raw materials$362,950 $302,719 $394,102 
Work-in-process255,249 164,655 157,406 
Finished goods807,219 534,522 394,378 
Other16,881 15,497 15,731 
 1,442,299 1,017,393 961,617 
Adjustment to value inventory at cost on the LIFO method(188,405)(109,588)(162,780)
 $1,253,894 $907,805 $798,837 

During the three and six months ended June 30, 2022, we implemented an inventory management program which resulted in permanent reductions of inventories valued under the last-in, first-out basis. This resulted in liquidations of inventory layers carried at costs prevailing in prior years and thereby decreased cost of goods sold by $7.3 million for both periods.