Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares	Mar. 31, 2018	Mar. 31, 2017
Capital Structure [Abstract]
Number of shares, net of treasury: Statement of changes in equity	56,855,187	57,590,085
Less: Non-vested equity shares that have not vested (Note 13)	(934,673)	(904,356)
Number of shares, net of treasury excluding non-vested equity shares that have not vested	55,920,514	56,685,729