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Capital Structure (Schedule Of Number Of Shares, Net Of Treasury) (Details) - shares
Dec. 31, 2016
Dec. 31, 2015
Capital Stucture [Abstract]    
Number of shares, net of treasury: 52,521,345 47,322,702
Less: Non-vested equity shares that have not vested (Note 13) (904,356) (589,447)
Number of shares, net of treasury excluding non-vested equity shares that have not vested 51,616,989 46,733,255