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Common Stock (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Common Stock [Abstract]      
Number of shares, net of treasury: Statement of changes in equity 56,568,425 56,685,925 56,369,737
Less: Non-vested equity shares that have not vested as of end of year (Note 18) 583,908 765,411 505,473
Number of shares, net of treasury excluding non-vested equity shares that have not vested 55,984,517 55,920,514 55,864,264