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Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares
Sep. 30, 2020
Sep. 30, 2019
Capital Structure [Abstract]    
Number of shares, net of treasury: Statement of changes in equity 56,638,725 56,568,425
Non-vested equity shares that have not vested as of end of period 324,000 583,908
Number of shares, net of treasury excluding non-vested equity shares that have not vested 56,314,725 55,984,517