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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Mar. 31, 2024
Inventory Disclosure [Abstract]    
Raw materials $ 163,523 $ 151,031
Work-in-process 27,898 26,669
Finished goods 44,579 40,554
Total at cost FIFO basis 236,000 218,254
LIFO cost less than FIFO cost (34,964) (32,163)
Net inventories $ 201,036 $ 186,091