Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares	Sep. 30, 2018	Sep. 30, 2017
Capital Structure [Abstract]
Number of shares, net of treasury: Statement of changes in equity	56,833,925	56,927,696
Less: Non-vested equity shares that have not vested (Note 13)	860,817	1,007,182
Number of shares, net of treasury excluding non-vested equity shares that have not vested	55,973,108	55,920,514