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Stock-Based Compensation and Stock Repurchases (Schedule Of Restricted Stock Units Issued And Vested) (Details) - Restricted Stock Units (RSUs) [Member] | Mar. 31, 2018 shares
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 168,084
Number of options, Vested | 97,156
Number of options, Unvested | 70,928
March 10, 2016 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 62,528
Number of options, Vested | 48,838
Number of options, Unvested | 13,690
April 11, 2016 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 5,625
Number of options, Vested | 1,406
Number of options, Unvested | 4,219
March 23, 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 63,144
Number of options, Vested | 46,912
Number of options, Unvested | 16,232
August 29, 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 7,394
Number of options, Unvested | 7,394
January 2, 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 29,393
Number of options, Unvested | 29,393
Directors [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 95,221
Directors [Member] | March 10, 2016 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 35,147
Directors [Member] | March 23, 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 30,681
Directors [Member] | January 2, 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 29,393
Management [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 72,863
Management [Member] | March 10, 2016 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 27,381
Management [Member] | April 11, 2016 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 5,625
Management [Member] | March 23, 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 32,463
Management [Member] | August 29, 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of options, Grants | 7,394

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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Vested And Nonvested, Outstanding, Number + References No definition available. + Details
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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Vested, Outstanding, Number + References No definition available. + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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. + Details
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