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Earnings Per Common Share (EPS) (Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share) (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Common Share (EPS) [Abstract]    
Options excluded from calculating diluted EPS because their effect was anti-dilutive 0 0