Rental Expense and Lease Commitments (Details) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Operating Leased Assets [Line Items]
Short-term Lease, Cost	$ 0	$ 0	$ 0
Sublease Income	0	0	0
Variable Lease, Cost	0	0	0
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	8,847,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	5,977,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	5,505,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	4,421,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	3,427,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	6,511,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	34,688,000
Receivable with Imputed Interest, Discount	3,012,000
Operating Lease, Payments	9,059,000	8,909,000
Finance Lease, Principal Payments	$ 1,132,000	$ 0
Operating Lease, Weighted Average Remaining Lease Term	5 years 6 months 3 days	5 years 11 months 26 days
Finance Lease, Weighted Average Remaining Lease Term	13 years 6 months 29 days
Operating Lease, Right-of-Use Asset	$ 30,809,000	$ 34,181,000
Operating Lease, Weighted Average Discount Rate, Percent	3.78%	3.86%
Finance Lease, Weighted Average Discount Rate, Percent	4.51%	0.00%
Operating Lease, Liability, Current	$ 7,965,000	$ 7,673,000
Operating Lease, Liability, Noncurrent	23,711,000	27,321,000
Operating Lease, Liability	31,676,000	34,994,000
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	13,525,000	0
Finance Lease, Liability, Current	544,000	0
Finance Lease, Liability, Noncurrent	13,540,000	0
Finance Lease, Liability	14,084,000	0
Operating Lease, Cost	9,101,000	9,175,000	$ 8,869,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	5,364,000	2,866,000
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	14,582,000	$ 0
Finance Lease, Liability, to be Paid, Year One	1,166,000
Finance Lease, Liability, to be Paid, Year Two	1,200,000
Finance Lease, Liability, to be Paid, Year Three	1,236,000
Finance Lease, Liability, to be Paid, Year Four	1,274,000
Finance Lease, Liability, to be Paid, Year Five	1,312,000
Finance Lease, Liability, to be Paid, after Year Five	13,008,000
Finance Lease, Liability, Undiscounted Excess Amount	$ 19,196,000
Income and Expenses, Lessee [Abstract]
Lessee, Finance Lease, Term of Contract	23 years
Dorner
Operating Leased Assets [Line Items]
Receivable with Imputed Interest, Discount	$ 5,112,000
Operating Lease, Right-of-Use Asset	1,035,000
Garvey
Operating Leased Assets [Line Items]
Operating Lease, Right-of-Use Asset	1,318,000
Operating Income (Loss)
Income and Expenses, Lessee [Abstract]
Lease, Cost	984,000
Interest Expense [Member]
Income and Expenses, Lessee [Abstract]
Lease, Cost	$ 634,000
Minimum [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	1 year