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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Jun. 30, 2022
Inventories    
Finished goods $ 328,094 $ 316,936
Work in process and powder blends 233,346 231,214
Raw materials 81,552 107,024
Inventories at current cost 642,992 655,174
Less: LIFO valuation (85,362) (84,338)
Total inventories $ 557,630 $ 570,836
Inventories (Textual) [Abstract]    
Percentage of inventories valued by using LIFO method 33.00%