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Note K - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
2016
   
2015
   
2014
 
Current tax expense
  $
2,645
    $
2,218
    $
3,637
 
Deferred tax (benefit) expense
   
(725
)
   
591
     
(517
)
Total income taxes
  $
1,920
    $
2,809
    $
3,120
 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   
2016
   
2015
 
Items giving rise to deferred tax assets:
               
Allowance for loan losses
  $
2,538
    $
2,302
 
Unrealized loss on securities available for sale
   
510
     
----
 
Deferred compensation
   
2,194
     
2,089
 
Deferred loan fees/costs
   
248
     
273
 
Other real estate owned
   
719
     
370
 
Accrued bonus
   
240
     
166
 
Purchase accounting adjustments
   
305
     
----
 
Net operating loss
   
258
     
----
 
Other
   
275
     
143
 
Items giving rise to deferred tax liabilities:
               
Mortgage servicing rights
   
(134
)
   
(149
)
FHLB stock dividends
   
(1,078
)
   
(1,074
)
Unrealized gain on securities available for sale
   
----
     
(157
)
Prepaid expenses
   
(283
)
   
(234
)
Depreciation and amortization
   
(823
)
   
(740
)
Other
   
(4
)
   
(5
)
Net deferred tax asset
  $
4,965
    $
2,984
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
2016
   
2015
   
2014
 
Statutory tax
  $
3,006
    $
3,870
    $
3,806
 
Effect of nontaxable interest
   
(433
)
   
(437
)
   
(418
)
Effect of nontaxable insurance premiums
   
(340
)
   
(336
)
   
(142
)
Income from bank owned insurance, net
   
(239
)
   
(210
)
   
(217
)
Effect of postretirement benefits
   
(19
)
   
71
     
238
 
Effect of nontaxable life insurance death proceeds
   
----
     
(11
)
   
----
 
Effect of state income tax
   
64
     
66
     
73
 
Tax credits
   
(211
)
   
(221
)
   
(231
)
Milton Merger Costs
   
73
     
----
     
----
 
Other items
   
19
     
17
     
11
 
Total income taxes
  $
1,920
    $
2,809
    $
3,120