Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares	Mar. 31, 2021	Mar. 31, 2020
Capital Structure [Abstract]
Number of shares, net of treasury: Statement of changes in equity	56,626,060	57,118,925
Non-vested equity shares that have not vested as of end of period	294,000	1,115,500
Number of shares, net of treasury excluding non-vested equity shares that have not vested	56,332,060	56,003,425