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Earnings Per Common Share (Tables)
12 Months Ended
Dec. 31, 2016
Earnings Per Common Share [Abstract]  
Reconciliation Of Earnings And Shares Used In Calculating Basic And Diluted EPS
    2016      2015     2014  
Net income available to common shareholders $ 30,469   $ 26,875   $ 27,893  
Weighted average common shares outstanding:                  
Total shares issued   14,689     14,398     14,261  
Unvested restricted stock awards   (75 )   (93 )   (64 )
Treasury shares   (178 )   (224 )   (304 )
Total basic weighted average common shares outstanding   14,436     14,081     13,893  
Incremental shares from assumed:                  
Exercise of stock options   20     24     26  
Vesting of restricted stock awards   35     30     27  
Total diluted weighted average common shares outstanding   14,491     14,135     13,946  
 
Basic earnings per common share  $ 2.11   $ 1.91   $ 2.01  
Diluted earnings per common share  $ 2.10   $ 1.90   $ 2.00  
Shares Excluded From Computation Of Diluted EPS
Stock options - - 3
Restricted stock awards 2 1 1
Total 2 1 4