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Share-Based Compensation (Summary Of Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-Based Compensation [Abstract]      
Outstanding at beginning of year, Number of Options 135,416    
Granted, Number of Options 0 0 0
Exercised, Number of Options (18,922)    
Forfeited, Number of Options    
Expired, Number of Options (14,245)    
Outstanding and exercisable at end of period, Number of Options 102,249    
Outstanding at beginning of year, Weighted Average Exercise Price $ 19.25    
Granted, Weighted Average Exercise Price    
Exercised, Weighted Average Exercise Price $ 18.99    
Forfeited, Weighted Average Exercise Price    
Expired, Weighted Average Exercise Price $ 19.87    
Outstanding and exercisable at end of period, Weighted Average Exercise Price $ 19.21    
Outstanding and exercisable at end of period, Weighted Average Remaining Contractual Term 1 year 3 months 18 days    
Outstanding and exercisable at end of period, Aggregate Intrinsic Value $ 899