Loss Contingencies (Narratives) (Details)			6 Months Ended			9 Months Ended
	Aug. 02, 2012 USD ($)	Aug. 02, 2012 EUR (€)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) Rate	Sep. 30, 2023 EUR (€)	Dec. 31, 2022 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual							$ 21,103,000	$ 22,575,000
Insurance Recoveries				$ (6,000)		$ (889,000)
Loss Contingency Accrual, Product Liability, Gross				21,809,000			21,103,000
Estimation of asbestos-related aggregate liability that is probable and estimable				7,047,000
Estimation of product-related aggregate liability				5,717,000
Loss Contingency Alleged Taxes Owed	$ 7,100,000	€ 6,700,000		2,000,000	€ 1,900,000
Loss Contingency Alleged Taxes Owed Including Penalties And Interest	$ 3,000,000	€ 2,800,000		2,300,000	€ 2,200,000
Accrual for Environmental Loss Contingencies				739,000
Loss Contingency Accrual, Provision				1,950,000		3,025,000
Loss Contingency Accrual, Payments				(1,238,000)		$ (3,608,000)
Estimated Insurance Recoveries				(8,265,000)			(8,272,000)
Loss Contingency Accrual, Product Liability, Net				$ 13,544,000			$ 12,831,000
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
Indemnity Costs Covered by Insurance, Percentage | Rate				100.00%
Gross Defense Costs Prior to Retro Premiums Required by Settlement, Percentage | Rate				65.00%
Minimum [Member]
Loss Contingencies [Line Items]
Product Liability Contingency, Third Party Recovery				$ 2,000,000
Loss contingency period				38 years	38 years
Estimation of asbestos-related aggregate liability that is probable and estimable				$ 5,300,000
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				9,700,000
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				781,000
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual				16,909,000
Accrued Liabilities
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross				4,900,000
Forecast [Member]
Loss Contingencies [Line Items]
Asbestos liability payments			$ 2,900,000
Loss settlement gross period			12 months
DEP [Member] | Magnetek [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies				$ 314,000