Loss Contingencies (Narratives) (Details)			3 Months Ended	6 Months Ended			12 Months Ended
	Aug. 02, 2012 USD ($)	Aug. 02, 2012 EUR (€)	Jun. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual							$ 22,575,000	$ 21,227,000
Insurance Recoveries					$ 102,000		1,109,000
Loss Contingency Accrual, Product Liability, Gross					22,746,000		22,575,000
Estimation of asbestos-related aggregate liability that is probable and estimable					7,749,000
Estimation of product-related aggregate liability					5,392,000
Loss Contingency Alleged Taxes Owed	$ 6,600,000	€ 6,700,000			1,900,000	€ 1,900,000
Loss Contingency Alleged Taxes Owed Including Penalties And Interest	$ 2,700,000	€ 2,800,000			2,200,000	€ 2,200,000
Accrual for Environmental Loss Contingencies					756,000
Loss Contingency Accrual, Provision					1,826,000		6,648,000
Loss Contingency Accrual, Payments					(1,553,000)		(6,409,000)
Estimated Insurance Recoveries					(9,059,000)		(9,160,000)
Loss Contingency Accrual, Product Liability, Net					$ 13,687,000		$ 13,415,000
Financial Guarantee Insurance Contracts, Risk Management Activities, Mitigating Claim Liabilities, Policy					75,000,000	75,000,000
Per Occurrence Limits on Self Insurance for General and Product Liability Coverage from inception through FY 2003					$ 2,000,000
Per Occurrence Limits on Self Insurance for General and Product Liability Coverage from FY 2004 through current FY					3,000,000
Minimum [Member]
Loss Contingencies [Line Items]
Product Liability Contingency, Third Party Recovery					$ 2,000,000
Loss contingency period					37 years	37 years
Estimation of asbestos-related aggregate liability that is probable and estimable					$ 5,800,000
Maximum [Member]
Loss Contingencies [Line Items]
Product Liability Contingency, Third Party Recovery					6,000,000
Estimation of asbestos-related aggregate liability that is probable and estimable					10,600,000
Litigation Settlement, Amount Awarded from Other Party					1,650,000
Magnetek [Member]
Loss Contingencies [Line Items]
Estimation of asbestos-related aggregate liability that is probable and estimable					524,000
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual					18,846,000
Accrued Liabilities
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross					3,900,000
Forecast [Member]
Loss Contingencies [Line Items]
Asbestos liability payments				$ 2,400,000
Loss settlement gross period				12 months
DEP [Member] | Magnetek [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies					$ 260,000
Travelers
Loss Contingencies [Line Items]
Increase (Decrease) in Insurance Settlements Receivable			$ 900,000