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Executive Stock Plans And Stock-Based Compensation (Narrative) (Details) $ in Millions | 12 Months Ended
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Mar. 31, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized compensation expense related to stock-based awards | $ | $ 6.0
Unrecognized compensation expense related to stock-based awards, weighted-average period expected to recognized | 1 year 1 month 5 days
Maximum [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares common stock expected to issue under the Plans | 2,000,000
Stock Appreciation Rights (SARs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period following grant date, in years | 10 years
Description of award vesting rights for SARs | vested in equal one-third tranches one, two, and three years after the grant date
Restricted Stock Units (RSUs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period, in years | 5 years
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%
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 2007 [Member] | Stock Appreciation Rights (SARs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Expiration period following grant date, in years | 10 years
Expiration period following grantee retirement, in years | 3 years
2002 Executive Stock Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares common stock expected to issue under the Plans | 500,000
2007 Stock Incentive Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares common stock expected to issue under the Plans | 1,350,000

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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