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Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares
Dec. 31, 2021
Dec. 31, 2020
Capital Structure [Abstract]    
Number of shares, net of treasury: Statement of changes in equity 57,657,172 56,614,559
Non-vested equity shares that have not vested as of end of period 1,010,612 294,000
Number of shares, net of treasury excluding non-vested equity shares that have not vested 56,646,560 56,320,559