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Shareholders' Equity (Schedule Of Shares Reserved For Future Issuance) (Details) | Sep. 30, 2017 shares
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Share-based Compensation Arrangement by Share-based Payment Award |
Class A shares and Class B shares reserved for issuance | 12,968,898
Conversion Of Class B To Class A Shares |
Share-based Compensation Arrangement by Share-based Payment Award |
Class A shares and Class B shares reserved for issuance | 7,575,427
Employee Stock Purchase Plan |
Share-based Compensation Arrangement by Share-based Payment Award |
Class A shares and Class B shares reserved for issuance | 2,000,000
2014 Long Term Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award |
Class A shares and Class B shares reserved for issuance | 1,992,436
2008 Stock Appreciation Rights Plan |
Share-based Compensation Arrangement by Share-based Payment Award |
Class A shares and Class B shares reserved for issuance | 1,376,353
2003 Stock Option Plan |
Share-based Compensation Arrangement by Share-based Payment Award |
Class A shares and Class B shares reserved for issuance | 24,682

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- Definition Aggregate number of common shares reserved for future issuance. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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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