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Inventories (Tables)
6 Months Ended
Sep. 30, 2025
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following (in thousands):
September 30, 2025March 31, 2025
At cost - FIFO basis:
Raw materials$178,944 $163,053 
Work-in-process35,669 30,349 
Finished goods41,327 37,197 
Total at cost FIFO basis255,940 230,599 
LIFO cost less than FIFO cost(38,603)(32,001)
Net inventories$217,337 $198,598