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Share Based Compensation (Summary Of Activity In Stock Option Plans) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding Options, Exercised 0 (200)
Employee Stock Option and Stock Appreciation Rights (SARs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 2,478 $ 1,918
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term 7 years 9 months 29 days 7 years 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 111,058 77,581
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 1,129 $ 618
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term 6 years 1 month 28 days 5 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 16.35 $ 17.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding Options, Beginning Balance 232,091 250,291
Outstanding Options, Granted 138,125 0
Outstanding Options, Exercised 0 (200)
Outstanding Options, Forfeited 0 (3,000)
Outstanding Options, Expired 0 0
Outstanding Options, Ending Balance 370,216 247,091
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Outstanding, Weighted-Average Exercise Price, Beginning Balance $ 17.36 $ 17.75
Outstanding, Weighted-Average Exercise Price, Granted 23.94 0.00
Outstanding, Weighted-Average Exercise Price, Exercised 0.00 17.79
Outstanding, Weighted-Average Exercise Price, Forfeited 0.00 26
Outstanding, Weighted-Average Exercise Price, Expired 0.00 0.00
Outstanding, Weighted-Average Exercise Price, Ending Balance $ 19.82 $ 17.65