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Earnings Per Share (Schedule Of Weighted Average Shares Outstanding) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Earnings Per Share [Abstract]        
Weighted average common shares, basic 24,399 24,381 24,389 24,380
Dilutive effect of stock options 41 36 41 39
Weighted average common shares, diluted 24,440 24,417 24,430 24,419