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Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Income Per Common Share From Continuing Operations Calculations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
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Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations | $ 25,568 |  | $ 20,403 |  | $ 32,954 |  | $ 22,761 |  | $ 20,901 |  | $ 18,900 |  | $ 37,133 |  | $ 24,052 |  | $ 101,686 |  | $ 100,986 |  | $ 103,860
Income from continuing operations available to participating securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (143) |  | (174) |  | (326)
Income from continuing operations available to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 101,543 |  | $ 100,812 |  | $ 103,534
Weighted average common shares outstanding - basic (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,300 |  | 27,264 |  | 27,252
Incremental share effect from: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonparticipating restricted stock (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  | 3 |  | 3
Stock-settled stock appreciation rights (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24 |  | 41 |  | 30
Weighted average common shares outstanding - diluted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,327 |  | 27,308 |  | 27,285
Income per common share from continuing operations - basic (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.72 |  | $ 3.70 |  | $ 3.80
Income per common share from continuing operations - diluted (in dollars per share) | $ 0.93 | [1] | $ 0.75 | [1] | $ 1.20 | [1] | $ 0.83 | [1] | $ 0.76 | [1] | $ 0.69 | [1] | $ 1.36 | [1] | $ 0.88 | [1] | $ 3.72 | [1] | $ 3.69 | [1] | $ 3.79
[1] | Diluted income (loss) per common share amounts are calculated independently for each of the quarters presented. Accordingly, the sum of the quarterly income (loss) per common share amounts may not agree with the fiscal year.

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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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