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Share-Based Compensation Plans (Share-Based Compensation Expense Included In Consolidated Statements Of Income) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation expense $ 302 $ 239
Salaries and Employee Benefits [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation expense 268 207
Other Noninterest Expense [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation expense $ 34 $ 32