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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jun. 30, 2023
Inventories    
Finished goods $ 336,340 $ 328,094
Work in process and powder blends 240,803 233,346
Raw materials 82,898 81,552
Inventories at current cost 660,041 642,992
Less: LIFO valuation (89,696) (85,362)
Total inventories $ 570,345 $ 557,630
Inventories (Textual) [Abstract]    
Percentage of inventories valued by using LIFO method 33.00% 33.00%