Leases, Cost Recogized in Consolidated Statements of Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Lease cost [Abstract]
Operating lease cost	$ 3,134,000	$ 2,962,000	$ 9,325,000	$ 8,522,000
Short-term lease cost	361,000	373,000	1,112,000	1,027,000
Variable lease cost	225,000	183,000	716,000	556,000
Finance lease cost [Abstract]
Amortization of finance lease assets	515,000	458,000	1,579,000	1,299,000
Interest on finance lease liabilities	83,000	98,000	269,000	274,000
Total lease cost	$ 4,318,000	$ 4,074,000	$ 13,001,000	$ 11,678,000