Inventory (Details) - USD ($)	Sep. 30, 2023	Mar. 31, 2023
Inventory [Abstract]
Raw materials	$ 152,835,000	$ 147,880,000
Work-in-process	11,078,000	7,033,000
Finished goods	200,270,000	201,198,000
Inventory, gross	364,183,000	356,111,000
Less allowance for excess and obsolete inventory	(16,490,000)	(16,436,000)
Inventory - net	347,693,000	339,675,000
Inventory unreturned	18,712,000	16,579,000
Total inventory	$ 366,405,000	$ 356,254,000