Loss Contingencies (Narratives) (Details)			3 Months Ended		6 Months Ended	9 Months Ended
	Aug. 02, 2012 USD ($)	Aug. 02, 2012 EUR (€)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual									$ 21,227,000	$ 11,944,000
Insurance Recoveries			$ 91,000	$ 8,052,000
Loss Contingency Accrual, Product Liability, Gross			22,212,000		$ 22,212,000				21,227,000
Estimation of asbestos-related aggregate liability that is probable and estimable			7,205,000		7,205,000
Estimation of product-related aggregate liability			6,215,000		6,215,000
Loss Contingency Alleged Taxes Owed	$ 7,800,000	€ 6,700,000
Loss Contingency Alleged Taxes Owed Including Penalties And Interest	$ 3,200,000	€ 2,800,000
Accrual for Environmental Loss Contingencies			758,000		758,000
Loss Contingency Accrual, Provision					2,071,000			$ 4,634,000
Loss Contingency Accrual, Payments					(1,177,000)			$ (3,403,000)
Estimated Insurance Recoveries			8,142,000		8,142,000				(8,052,000)
Loss Contingency Accrual, Product Liability, Net			14,070,000		14,070,000				$ 13,175,000
Loss Contingency Accrual, Period Increase (Decrease)					$ 1,830,000
Gain (Loss) Related to Litigation Settlement			3,006,000
Financial Guarantee Insurance Contracts, Risk Management Activities, Mitigating Claim Liabilities, Policy					75,000,000
Minimum [Member]
Loss Contingencies [Line Items]
Product Liability Contingency, Third Party Recovery					$ 2,000,000
Loss contingency period					37 years
Estimation of asbestos-related aggregate liability that is probable and estimable			5,400,000		$ 5,400,000
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		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			581,000		581,000
Fiscal year 2004 [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Product Liability Contingency, Third Party Recovery					3,000,000
Fiscal year 2003 [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Product Liability Contingency, Third Party Recovery					2,000,000
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			18,711,000		18,711,000
Accrued Liabilities
Loss Contingencies [Line Items]
Loss Contingency Accrual, Product Liability, Gross			3,500,000		3,500,000
Gain (Loss) Related to Litigation Settlement			1,500,000
Forecast [Member]
Loss Contingencies [Line Items]
Asbestos liability payments					$ 2,000,000
Loss settlement gross period					12 months
Loss Contingency Alleged Taxes Owed						$ 2,200,000	€ 1,900,000
Loss Contingency Alleged Taxes Owed Including Penalties And Interest						$ 3,000,000	€ 2,600,000
DEP [Member] | Magnetek [Member]
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies			$ 350,000		$ 350,000
Travelers
Loss Contingencies [Line Items]
Increase (Decrease) in Insurance Settlements Receivable				$ 900,000