Executive Stock Plans And Stock-Based Compensation (Narrative) (Details) $ in Millions	12 Months Ended
Mar. 31, 2022 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized \| shares	1,000,000
Unrecognized compensation expense related to stock-based awards \| $	$ 4.5
Unrecognized compensation expense related to stock-based awards, weighted-average period expected to recognized	10 months 24 days
Performance Share Awards Psas [Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	3 years
Performance Share Awards Psas [Member \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of award grant paid	0.00%
Performance Share Awards Psas [Member \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of award grant paid	150.00%
Plans Before Fiscal 2020 [Member] \| Outside Directors [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	3 years
Plans After Fiscal 2020 [Member] \| Outside Directors [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	1 year
Plans before Fiscal 2022 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	5 years
Plans After Fiscal 2022 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	3 years

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

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-Topic 718
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