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INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2017
INCOME TAXES [Abstract]  
Provision for Income Taxes
The provision for income taxes for the years ended December 31 is as follows:

(000's omitted)
 
2017
  
2016
  
2015
 
Current:
         
Federal
 
$
31,152
  
$
32,829
  
$
27,663
 
State and other
  
6,788
   
4,890
   
2,608
 
Deferred:
            
Federal
  
(28,146
)
  
11,444
   
9,604
 
State and other
  
(546
)
  
1,622
   
1,112
 
Provision for income taxes
 
$
9,248
  
$
50,785
  
$
40,987
 
Components of Net Deferred Tax Liability
Components of the net deferred tax liability, included in other liabilities, as of December 31 are as follows:
 
(000's omitted)
 
2017
  
2016
 
Allowance for loan losses
 
$
11,675
  
$
18,366
 
Employee benefits
  
4,216
   
6,311
 
Debt extinguishment
  
0
   
299
 
Other, net
  
0
   
5,202
 
  Deferred tax asset
  
15,891
   
30,178
 
         
Investment securities
  
22,690
   
32,839
 
Tax-deductible goodwill
  
39,154
   
43,504
 
Loan origination costs
  
6,109
   
8,228
 
Depreciation
  
2,372
   
71
 
Mortgage servicing rights
  
330
   
548
 
Pension
  
13,228
   
18,194
 
Other, net
  
542
   
0
 
  Deferred tax liability
  
84,425
   
103,384
 
Net deferred tax liability
 
$
(68,534
)
 
$
(73,206
)
Reconciliation of Differences between Federal Statutory Income Tax Rate and Effective Tax Rate
A reconciliation of the differences between the federal statutory income tax rate and the effective tax rate for the years ended December 31 is shown in the following table:
 
  
2017
  
2016
  
2015
 
Federal statutory income tax rate
  
35.0
%
  
35.0
%
  
35.0
%
Increase (reduction) in taxes resulting from:
            
Tax-exempt interest
  
(3.8
)
  
(4.0
)
  
(5.0
)
State income taxes, net of federal benefit
  
2.5
   
2.7
   
1.8
 
Stock-based compensation
  
(2.0
)
  
0
   
0
 
Federal deferred tax revaluation adjustment
  
(23.7
)
  
0
   
0
 
Other, net
  
(2.2
)
  
(0.9
)
  
(0.8
)
Effective income tax rate
  
5.8
%
  
32.8
%
  
31.0
%
Reconciliation of Unrecognized Tax Benefits
A reconciliation of the unrecognized tax benefits for the years ended December 31 is shown in the following table:
 
(000’s omitted)
 
2017
  
2016
  
2015
 
Unrecognized tax benefits at beginning of year
 
$
92
  
$
127
  
$
162
 
Changes related to:
            
Lapse of statutes of limitations
  
(68
)
  
(35
)
  
(35
)
Unrecognized tax benefits at end of year
 
$
24
  
$
92
  
$
127