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Earnings per Share and Stock Plans - Narrative (Details)	1 Months Ended	12 Months Ended
	Jun. 30, 2019 shares	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	May 13, 2024 USD ($)	Mar. 18, 2024 $ / shares	Mar. 31, 2021 $ / shares	Mar. 26, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares not included in the computation of diluted loss per share because they were antidilutive (in shares) | shares		479,000	651,000
Treasury stock (in shares) | shares			31,000
Treasury stock, value			$ 1,001,000
Share-based payment arrangement, amount		$ 2,825,000
Quarterly dividend rate (in dollars per share) | $ / shares						$ 0.07
Annual dividend rate (in dollars per share) | $ / shares						$ 0.28
Stock repurchase program, authorized amount								$ 20,000,000
Payments for repurchase of common stock		$ 0	1,001,000	$ 0
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend distribution declared per preferred share purchase right					$ 2,020,000
2016 LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, number of additional shares authorized (in shares) | shares	2,500,000
Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of common stock which may be granted under the plan (in shares) | shares		2,500,000
Long Term Incentive Plan | Cost of Goods Sold, Selling, and General and Administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 12,039,000	$ 10,425,000	$ 11,246,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares not included in the computation of diluted loss per share because they were antidilutive (in shares) | shares		165,000	179,000
Period options generally become exercisable		3 years
Weighted average fair value grant price (in dollars per share) | $ / shares		$ 36.13	$ 34.49	$ 35.35			$ 29.58
ESOP Debt Guarantee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average exercise price (in dollars per share) | $ / shares		$ 35.37	$ 34.54	$ 33.82			$ 27.45
ESOP Debt Guarantee | Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants (in shares) | shares		339,000
Vesting percentage		33.00%
Period options generally become exercisable		3 years
Share based compensation, exercise price, percent of fair market value		1
Number of options outstanding, in-the-money (in shares) | shares		1,048,000
Number of options, exercisable, in-the-money | shares		499,000
Closing stock price (in dollars per share) | $ / shares		$ 44.63
Total intrinsic value of stock options exercised		$ 870,000	$ 360,000	$ 2,513,000
Grant date fair value of options that vested (in dollars per share) | $ / shares		$ 11.00	$ 10.36	$ 11.19
Unrecognized compensation cost related to non-vested stock options		$ 3,277,000
Weighted average period of recognition for unrecognized compensation cost		2 years
Weighted-average fair value of options (in dollars per share) | $ / shares		$ 12.97	$ 11.13	$ 17.71
ESOP Debt Guarantee | Long Term Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average exercise price (in dollars per share) | $ / shares		15.16
ESOP Debt Guarantee | Long Term Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average exercise price (in dollars per share) | $ / shares		$ 38.70
ESOP Debt Guarantee | Stock Incentive Plan of Magnetek
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants (in shares) | shares		164,461
Restricted Stock | Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of recognition for unrecognized compensation cost		1 year 8 months 12 days
Total unrecognized compensation cost related to unvested restricted stock units		$ 2,996,000
Fair value of restricted stock units that vested during the period		$ 5,720,000	$ 4,713,000
Restricted Stock | Long Term Incentive Plan | Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.33%
Restricted Stock | Long Term Incentive Plan | Share-Based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.33%
Restricted Stock | Long Term Incentive Plan | Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.33%
Directors Stock Plan | Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1,174,000	$ 1,194,000	$ 959,000
Shares of stock granted under the LTIP to non-executive directors (in shares) | shares		28,512	41,313	21,928
Weighted average fair value grant price (in dollars per share) | $ / shares		$ 41.17	$ 28.91	$ 43.73

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