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REGULATORY MATTERS (Tables)
12 Months Ended
Dec. 31, 2011
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:

   
2011
 
2010
(000's omitted)
 
Company
Bank
 
Company
Bank
Tier 1 capital to average assets
           
  Amount
 
$508,250
$459,680
 
$424,408
$380,174
  Ratio
 
8.38%
7.60%
 
8.23%
7.40%
  Minimum required amount
 
$242,559
$241,995
 
$206,206
$205,622

Tier 1 capital to risk-weighted assets
           
  Amount
 
$508,250
$502,193
 
$424,408
$380,174
  Ratio
 
14.31%
12.99%
 
13.49%
12.13%
  Minimum required amount
 
$142,074
$141,529
 
$125,840
$125,404
             
Total core capital to risk-weighted assets
           
  Amount
 
$550,763
$502,193
 
$463,777
$419,408
  Ratio
 
15.51%
14.19%
 
14.74%
13.38%
  Minimum required amount
 
$284,148
$283,058
 
$251,680
$250,809