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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2015
Shareholders' Equity [Abstract]  
Changes In Shares Of Common Stock
  Outstanding   Treasury   Issued
2015          
Shares outstanding at beginning of year 14,118,048   279,461   14,397,509
Restricted stock awards issued 59,834   (59,834 ) -
Restricted stock awards forfeited (3,490 ) 3,490   -
Stock options exercised 18,922   (18,922 ) -
Treasury stock purchases (7,523 ) 7,523   -
Stock awards 4,401   (4,401 ) -
Shares outstanding at end of year 14,190,192   207,317   14,397,509
 
2014          
Shares outstanding at beginning of year 13,829,355   332,242   14,161,597
Shares issued for the SDN acquisition 235,912   -   235,912
Restricted stock awards issued 43,242   (43,242 ) -
Restricted stock awards forfeited (15,441 ) 15,441   -
Stock options exercised 34,082   (34,082 ) -
Treasury stock purchases (9,102 ) 9,102   -
Shares outstanding at end of year 14,118,048   279,461   14,397,509