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REGULATORY MATTERS (Tables)
12 Months Ended
Dec. 31, 2012
REGULATORY MATTERS [Abstract]  
Capital ratios and amounts
The capital ratios and amounts of the Company and the Bank as of December 31 are presented below:

   
2012
  
2011
 
(000's omitted)
 
Company
  
Bank
  
Company
  
Bank
 
Tier 1 capital to average assets
            
  Amount
 $588,220  $530,753  $508,250  $459,680 
  Ratio
  8.40%  7.60%  8.38%  7.60%
  Minimum required amount
 $280,151  $279,524  $242,559  $241,995 

Tier 1 capital to risk-weighted assets
            
  Amount
 $588,220  $530,753  $508,250  $502,193 
  Ratio
  15.09%  13.66%  14.31%  12.99%
  Minimum required amount
 $155,904  $155,392  $142,074  $141,529 
                  
Total core capital to risk-weighted assets
                
  Amount
 $631,409  $573,942  $550,763  $502,193 
  Ratio
  16.20%  14.77%  15.51%  14.19%
  Minimum required amount
 $311,808  $310,784  $284,148  $283,058