Income Taxes 2 of 2 (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 12,908	$ 17,567
Deferred tax assets:
State and foreign net operating loss carryforwards	6,656	10,075
Employee benefit plans	11,609	16,625
Insurance reserves	3,500	3,609
Accrued vacation and incentive costs	(4,071)	(3,682)
Federal tax credit carryforwards	(12,065)	(12,427)
Deferred Tax Asset Lease Liability	16,544	10,872
Equity compensation	4,552	3,927
Other	1,073	2,596
Valuation allowance	(15,978)	(16,147)
Deferred tax assets after valuation allowance	67,247	71,031
Deferred tax liabilities:
Property, plant, and equipment	(7,389)	(4,917)
Deferred Tax Liability Lease Asset	15,706	10,130
Intangible assets	(88,116)	(95,316)
Total deferred tax liabilities	(111,211)	(110,363)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	414	141	$ 132
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	0	281	0
Foreign currency translation	(3)	(8)	9
Unrecognized Tax Benefits, Ending Balance	411	414	141
Operating Loss Carryforwards [Line Items]
State and foreign net operating loss carryforwards	6,656	10,075
Deferred Tax Assets, Valuation Allowance	15,978	16,147
Deferred Tax Asset Lease Liability	16,544	10,872
Deferred Tax Liability Lease Asset	15,706	10,130
Foreign net operating losses	2,943
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	12,088	11,825
Foreign subsidiary income	48,399	42,127	$ 30,894
Deferred Tax Liabilities, Net	43,964	39,332
Deferred Tax Assets, in Process Research and Development	6,976	2,003
Deferred Tax Asset, Interest Carryforward	3,271	3,795
Federal tax credit carryforwards	(12,065)	(12,427)
Accrued vacation and incentive costs	(4,071)	(3,682)
Federal
Operating Loss Carryforwards [Line Items]
Foreign net operating losses	2,070	$ 4,322
Magnetek [Member]
Deferred tax assets:
State and foreign net operating loss carryforwards	81,406
Operating Loss Carryforwards [Line Items]
State and foreign net operating loss carryforwards	81,406
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 61,465