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Note 19 - Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   

Quoted Prices

                         
   

In Active

   

Significant

                 
   

Markets for

   

Other

   

Significant

         
   

Identical

   

Observable

   

Unobservable

         

(Dollars in thousands)

 

Assets

   

Inputs

   

Inputs

   

Balance at

 
   

(Level 1)

   

(Level 2)

   

(Level 3)

   

Date Indicated

 

Equity Securities Held at Fair Value - December 31, 2022

                               

Equity securities

  $ 6,024     $ -     $ 2,542     $ 8,566  
                                 

Investment Securities, Available for Sale - December 31, 2022

                               

U. S. Government and federal agency

  $ -     $ -     $ -     $ -  

U. S. Treasury notes and bonds

    78,204       -       -       78,204  

State and municipal

    -       229,938       -       229,938  

Mortgage-backed

    -       208,563       -       208,563  

Corporate

    -       711       -       711  

Asset-backed Securities

    -       12,333       -       12,333  

Total

  $ 78,204     $ 451,545     $ -     $ 529,749  
                                 

Derivative Instruments - December 31, 2022

                               

Interest rate derivative contracts - assets

  $ -     $ 9,204     $ -     $ 9,204  

Interest rate derivative contracts - liabilities

  $ -     $ 5,823     $ -     $ 5,823  
                                 

Equity Securities Held at Fair Value - December 31, 2021

                               

Equity securities

  $ 6,724     $ -     $ 1,768     $ 8,492  
                                 

Investment Securities, Available for Sale - December 31, 2021

                               

U. S. Government and federal agency

  $ -     $ 2,008     $ -     $ 2,008  

U. S. Treasury notes and bonds

    91,979       -       -       91,979  

State and municipal

    -       514,797       20,050       534,847  

Mortgage-backed

    -       433,115       -       433,115  

Corporate

    -       19,642       1,000       20,642  

Asset-backed Securities

    -       16,294       -       16,294  

Total

  $ 91,979     $ 985,856     $ 21,050     $ 1,098,885  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

(Dollars in thousands)

               
   

2022

   

2021

 

Equity Securities Held at Fair Value

               

Balance, January 1

  $ 1,768     $ 1,485  

Total realized and unrealized gains included in noninterest income

    161       166  

Net purchases, sales, calls, and maturities

    613       117  

Balance, December 31

  $ 2,542     $ 1,768  
                 

Investment Securities, Available for Sale

               

Balance, January 1

  $ 21,050     $ 11,423  

Total unrealized gains/(losses) included in other comprehensive income

    -       1,720  

Net purchases, sales, calls, and maturities

    -       7,907  

Transfer to held to maturity

    (21,050 )     -  

Balance, December 31

  $ -     $ 21,050  
Fair Value Measurements, Nonrecurring [Table Text Block]
            Quoted Prices                  
            In Active     Significant          
            Markets for     Other     Significant  
   

Balances at

   

Identical

   

Observable

   

Unobservable

 

(Dollars in thousands)

 

Dates

   

Assets

   

Inputs

   

Inputs

 
   

Indicated

   

(Level 1)

   

(Level 2)

   

(Level 3)

 

Impaired Loans

                               

December 31, 2022

  $ 2,846     $ -     $ -     $ 2,846  

December 31, 2021

  $ 5,433     $ -     $ -     $ 5,433  
                                 

Other Real Estate

                               

December 31, 2022

  $ -     $ -     $ -     $ -  

December 31, 2021

  $ 194     $ -     $ -     $ 194