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Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares
Sep. 30, 2019
Sep. 30, 2018
Capital Structure [Abstract]    
Number of shares, net of treasury: Statement of changes in equity 56,568,425 56,833,925
Less: Non-vested equity shares that have not vested (Note 14) 583,908 860,817
Number of shares, net of treasury excluding non-vested equity shares that have not vested 55,984,517 55,973,108