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Shareholders' Equity (Changes In Shares Of Common Stock) (Details) - shares
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Shareholders Equity [Line Items]    
Treasury stock, beginning balance 154,617  
Shares issued, beginning balance 14,692,214 14,397,509
Common stock issued for acquisition   294,705
Restricted stock awards forfeited
Stock options exercised
Treasury stock purchases  
Treasury stock, ending balance 156,199  
Shares issued, ending balance 14,692,214 14,692,214
Common Stock [Member]    
Shareholders Equity [Line Items]    
Shares outstanding, beginning balance 14,537,597 14,190,192
Common stock issued for acquisition   294,705
Restricted stock awards forfeited (9,759) (4,914)
Stock options exercised 12,500 15,100
Treasury stock purchases (4,323)  
Shares outstanding, ending balance 14,536,015 14,495,083
Treasury Stock [Member]    
Shareholders Equity [Line Items]    
Treasury stock, beginning balance 154,617 207,317
Restricted stock awards forfeited 9,759 4,914
Stock options exercised (12,500) (15,100)
Treasury stock purchases 4,323  
Treasury stock, ending balance 156,199 197,131