Inventories (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Inventory [Line Items]
Raw materials	$ 148,908		$ 129,015
Work-in-process	28,422		28,093
Finished goods	43,369		36,661
At cost - FIFO basis:	220,699		193,769
LIFO cost less than FIFO cost	(27,910)		(21,630)
Inventory, Supplies, Net of Reserves	192,789
Net inventories	192,789		$ 172,139
Increase (Decrease) in Inventories	$ 30,754	$ 21,959