Common Stock, Capital Shares, Reserved for Future Issuance, New Shares

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Common Stock, Capital Shares Reserved for Future Issuance, Unissued Shares

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- Definition

Restricted Stock Units, Conversion Ratio For Securities Into Which Each RSU May Be Converted

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Restricted Stock Units, Number of Securities Into Which Each Restricted Stock Unit May Be Converted

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Exercisability Period, from Date of Grant

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Extension of Expiration Period

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- Definition

Aggregate number of common shares reserved for future issuance.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

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-Topic 718
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- Definition

Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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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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- Definition

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

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Gross number of share options (or share units) granted during the period.

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Share-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions				1 Months Ended	12 Months Ended
	Aug. 04, 2020 shares	May 04, 2020 $ / shares shares	May 31, 2014 shares	Jun. 30, 2014 shares	Mar. 31, 2021 USD ($) shares	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares awarded, per employee, annual (in shares)			1,000,000.0	2,500,000
Extension of plan term				10 years
Share-based compensation expense, not yet recognized \| $					$ 6.6
Share-based compensation expense, not yet recognized, period for recognition					1 year
Number of shares available for issuance under plan (in shares)					2,800,000
Options granted (in shares)					249,900	302,700	294,500
Options exercised, intrinsic value \| $					$ 2.2	$ 0.4	$ 0.8
Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock units granted in period (in shares)		79,070
Award vesting period					3 years
Restricted Stock Units (RSUs) & Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock units granted in period (in shares)		73,636
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)		249,875
Award grant exercise price (in dollars per share) \| $ / shares		$ 39.98
Award exercisability period, from date of grant (not greater than)					10 years
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock units granted in period (in shares)		907			179,700	220,300	226,400
Award vesting period					3 years
Restricted Stock Units (RSUs) \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock units granted in period (in shares)	3,732
Number of securities into which each restricted stock unit may be converted	1
Restricted stock units, conversion ratio for securities into which each RSU may be converted					1
2005 Long-term Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grant (in shares)			5,000,000.0
Number of additional shares authorized under plan (in shares)				1,800,000
Long-term Incentive Plan, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance (in shares)	2,827,210
Number of new shares for future issuance under 2020 Long-Term Incentive Plans (in shares)	2,000,000
Number of unissued shares reserved for 2020 Long-Term Incentive Plans (in shares)	827,210