Class of Warrant or Right, Percentage of Securities Called by Warrants or Rights

No definition available.

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- Definition

-- None. No documentation exists for this element. --

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No definition available.

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- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

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- Definition

Dividends Payable, Annual Dividend Rate Amount Per Share

+ References

No definition available.

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- Definition

-- None. No documentation exists for this element. --

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No definition available.

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- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

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- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

+ Details

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
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-Subparagraph (h)(1)(i)
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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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- Definition

Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Paragraph 14
-Subparagraph (a)
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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Net number of non-option equity instruments granted to participants.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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-Name Accounting Standards Codification
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-Paragraph 2
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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Name Accounting Standards Codification
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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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-Name Accounting Standards Codification
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-Paragraph 2
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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (a)(2)
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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Earnings Per Share and Stock Plans (Narrative) (Details) - USD ($)		12 Months Ended
	May 19, 2009	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 24, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 946,000
Voting common stock: shares issued		23,045,479	22,565,613
Common Stock, Value, Issued		$ 230,000	$ 226,000
Sale of Stock, Price Per Share		$ 22.00
Common shares not included in the computation of diluted loss per share because they were antidilutive		0	340,000	282,000
Proceeds from the issuance of common stock		$ 6,332,000	$ 50,439,000	$ 242,000
Dividend distribution declared per preferred share purchase right		1,150,000
Quarterly dividend rate per share						$ 0.05
Annual dividend rate per share						$ 0.2
Stock-based compensation		$ 5,586,000	$ 5,914,000	$ 4,063,000
ESOP Debt Guarantee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average Exercise Price		$ 21.04	$ 19.10	$ 20.13	$ 18.86
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period options generally become exercisable		3 years
Fair value of restricted stock units that vested during the period			$ 15.69
Shares of restricted stock that vested during the period		(49,221)	(77,349)
Weighted average fair value grant price		$ 19.42	$ 18.92	$ 26.15	$ 23.35
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		2,000,000
Long Term Incentive Plan \| ESOP Debt Guarantee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants		903,975
Number of options at the money		922,450
Closing stock price		$ 35.84
Total intrinsic value of stock options exercised		5,851,000	$ 252,000	$ 81,000
Fair value of shares that vested (price per share)		7.42	8.56	$ 8.85
Proceeds from the issuance of common stock		6,332,000	$ 439,000
Unrecognized compensation cost related to non-vested stock options		$ 2,515,000
Weighted average period of recognition for unrecognized compensation cost		2 years 8 months 12 days
Weighted-average fair value of options		$ 7.66	$ 5.59	$ 8.58
Long Term Incentive Plan \| ESOP Debt Guarantee \| ESOP Debt Guarantee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options at the money		306,218
Long Term Incentive Plan \| ESOP Debt Guarantee \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Percent Of Shares Available To Exercise At Year One		$ 0.25
Exercise period from the date options were granted		1 year
Weighted-average Exercise Price		$ 13.10
Long Term Incentive Plan \| ESOP Debt Guarantee \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Percent Of Shares Available To Exercise At Year One		$ 1
Exercise period from the date options were granted		10 years
Weighted-average Exercise Price		$ 28.45
Long Term Incentive Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of recognition for unrecognized compensation cost		2 years 5 months
Total unrecognized compensation cost related to unvested restricted stock units		$ 4,994,000
Fair value of restricted stock units that vested during the period		$ 3,210,000	$ 3,238,000
Long Term Incentive Plan \| Restricted Stock \| Third Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.00%
Long Term Incentive Plan \| Restricted Stock \| Fourth Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.00%
Long Term Incentive Plan \| Restricted Stock \| Fifth Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		33.00%
Long Term Incentive Plan \| Directors Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 430,000
Shares of stock granted under the LTIP to non-executive directors		16,667	27,960	19,384
Weighted average fair value grant price		$ 25.80	$ 15.74	$ 22.70
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		$ 5,586,000	$ 5,914,000	$ 4,063,000
Stock Incentive Plan of Magnetek [Member] \| ESOP Debt Guarantee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants		164,461
Non Qualified Stock Option Plan \| ESOP Debt Guarantee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period options generally become exercisable		4 years
Shareholders Right Plan \| Directors Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of common stock acquired	$ 0.2
Percentage of newly created series A junior participating preferred shares	0.10%
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		127,000
STAHL [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Voting common stock: shares issued		2,273,000
Common Stock, Value, Issued		$ 50,000,000