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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Reconciliation Of Basic And Diluted Earnings Per Share
    Three Months Ended
    March 31,
    2016   2015
 
Net income $ 4,406 $ 3,881
 
Weighted average common shares outstanding        
Basic   6,009,198   5,953,538
Effect of dilutive employee stock options   71,826   79,719
Diluted   6,081,024   6,033,257
 
Anti-dilutive options excluded from earnings per share calculation   93,508   10,500
 
Per Common Share Data:        
Basic earnings per share $ 0.73 $ 0.65
Diluted earnings per share $ 0.72 $ 0.64