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Note 7 - Fair Value Measurements and Fair Value of Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
      

June 30, 2025

 
      

Fair Value Measurements at Reporting Date Using

 
  

Total Fair Value

  

Quoted Prices in Active Markets for Identical Assets (Level 1)

  

Significant Other Observable Inputs (Level 2)

  

Significant Unobservable Inputs (Level 3)

 

(dollars in thousands)

                

Recurring fair value measurements: Assets

                

Investment securities:

                

Available-for-sale:

                

Federal agency obligations

 $359,417  $-  $359,417  $- 

Residential mortgage pass-through securities

  628,139   -   628,139   - 

Commercial mortgage pass-through securities

  26,572   -   26,572   - 

Obligations of U.S. states and political subdivisions

  207,126   -   200,547   6,579 

Corporate bonds and notes

  4,995   -   4,995   - 

Asset-backed securities

  823   -   823   - 

Other securities

  128   128   -   - 

Total available-for-sale

  1,227,200   128   1,220,493   6,579 
                 

Equity securities

  19,707   9,920   9,787   - 

Derivatives

  23,900   -   23,900   - 

Total assets

 $1,270,807  $10,048  $1,254,180  $6,579 
      

December 31, 2024

 
      

Fair Value Measurements at Reporting Date Using

 
  

Total Fair Value

  

Quoted Prices in Active Markets for Identical Assets (Level 1)

  

Significant Other Observable Inputs (Level 2)

  

Significant Unobservable Inputs (Level 3)

 

(dollars in thousands)

                

Recurring fair value measurements: Assets

                

Investment securities:

                

Available-for-sale:

                

Federal agency obligations

 $84,670  $-  $84,670  $- 

Residential mortgage pass- through securities

  378,838   -   378,838   - 

Commercial mortgage pass-through securities

  20,892   -   20,892   - 

Obligations of U.S. states and political subdivisions

  122,404   -   115,878   6,526 

Corporate bonds and notes

  4,987   -   4,987   - 

Asset-backed securities

  885   -   885   - 

Other securities

  171   171   -   - 

Total available-for-sale

 $612,847  $171  $606,150  $6,526 
                 

Equity securities

  20,092   9,739   10,353   - 

Derivatives

  37,398   -   37,398   - 

Total assets

 $670,337  $9,910  $653,901  $6,526 
Fair Value Measurements, Nonrecurring [Table Text Block]
      

Fair Value Measurements at Reporting Date Using

 

Assets measured at fair value on a nonrecurring basis:

 June 30, 2025  Quoted Prices in Active Markets for Identical Assets (Level 1)  Significant Other Observable Inputs (Level 2)  Significant Unobservable Inputs (Level 3) 

Collateral dependent loans:

 

(dollars in thousands)

 

Commercial

 $549  $-  $-  $549 

Commercial real estate

  633   -   -   633 
      

Fair Value Measurements at Reporting Date Using

 

Assets measured at fair value on a nonrecurring basis:

 December 31, 2024  Quoted Prices in Active Markets for Identical Assets (Level 1)  Significant Other Observable Inputs (Level 2)  Significant Unobservable Inputs (Level 3) 

Collateral dependent loans:

 

(dollars in thousands)

 

Commercial

 $726  $-  $-  $726 

Commercial real estate

  2,913   -   -   2,913 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  Obligations of U.S. states and political subdivisions 
  

(dollars in thousands)

 

Beginning balance, January 1, 2025

 $6,526 

Principal paydowns

  (156)

Change in unrealized gain (loss)

  209 

Ending balance, June 30, 2025

 $6,579 
  Obligations of U.S. states and political subdivisions 
  

(dollars in thousands)

 

Beginning balance, January 1, 2024

 $7,122 

Principal paydowns

  (304)

Changes in unrealized loss

  (292)

Ending balance, December 31, 2024

 $6,526 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

June 30, 2025

           
  

Fair Value

 

Valuation Techniques

 

Unobservable Input

 

Rate

 

Securities available-for-sale:

    

(dollars in thousands)

      

Obligations of U.S. states and political subdivisions

 $6,579 

Discounted cash flows

 

Discount rate

  4.7%

December 31, 2024

           
  

Fair Value

 

Valuation Techniques

 

Unobservable Input

 

Rate

 

Securities available-for-sale:

    

(dollars in thousands)

      

Obligations of U.S. states and political subdivisions

 $6,526 

Discounted cash flows

 

Discount rate

  5.0%
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

June 30, 2025

           

(dollars in thousands)

 

Fair Value

  

Valuation Techniques

Unobservable Input

 

Range (weighted average)

 

Commercial loans

 $549  

Appraisals of collateral value

Adjustment for comparable sales

 -10% to +5% (-4.3%) 

Commercial real estate loans

  633  

Appraisals of collateral value

Adjustment for comparable sales

 -10% to +5% (-2.17%) 

December 31, 2024

           

(dollars in thousands)

 

Fair Value

  

Valuation Techniques

Unobservable Input

 

Range (weighted average)

 

Commercial loans

 $726  

Appraisals of collateral value

Adjustment for comparable sales

  -10% to +5% (-4.3%) 

Commercial real estate loans

  2,913  

Appraisals of collateral value

Adjustment for comparable sales

 

-40% to +0% (-14.3%)

 
Fair Value, by Balance Sheet Grouping [Table Text Block]
          

Fair Value Measurements

 
  

Carrying Amount

  

Fair Value

  

Quoted Prices in Active Markets for Identical Assets (Level 1)

  

Significant Other Observable Inputs (Level 2)

  

Significant Unobservable Inputs (Level 3)

 
  

(dollars in thousands)

 
                     

June 30, 2025

                    

Financial assets:

                    

Cash and due from banks

 $596,533  $596,533  $596,533  $-  $- 

Securities available-for-sale

  1,227,200   1,227,200   128   1,220,493   6,579 

Restricted investments in bank stocks

  49,248   n/a   n/a   n/a   n/a 

Equity securities

  19,707   19,707   9,920   9,787   - 

Net loans

  11,008,287   10,834,868   -   -   10,834,868 

Derivatives - interest rate contracts

  23,900   23,900   -   23,900   - 

Accrued interest receivable

  60,405   60,405   -   5,454   54,951 
   .                 

Financial liabilities:

                    

Noninterest-bearing deposits

  2,424,529   2,424,529   2,424,529   -   - 

Interest-bearing deposits

  8,853,958   8,840,224   5,788,943   3,051,281   - 

Borrowings

  783,859   783,562   -   783,562   - 

Subordinated debentures

  276,500   276,327   -   276,327   - 

Accrued interest payable

  15,936   15,936   -   15,936   - 
                     

December 31, 2024

                    

Financial assets:

                    

Cash and due from banks

 $356,488  $356,488  $356,488  $-  $- 

Investment securities available-for-sale

  612,847   612,847   171   606,150   6,526 

Restricted investment in bank stocks

  40,449   n/a   n/a   n/a   n/a 

Equity securities

  20,092   20,092   9,739   10,353   - 

Net loans

  8,192,125   7,980,038   -   -   7,980,038 

Derivatives - interest rate contracts

  37,398   37,398   -   37,398   - 

Accrued interest receivable

  45,498   45,498   -   5,444   40,054 
                     

Financial liabilities:

                    

Noninterest-bearing deposits

  1,422,044   1,422,044   1,422,044   -   - 

Interest-bearing deposits

  6,398,070   6,387,896   3,840,870   2,547,026   - 

Borrowings

  688,064   687,273   -   687,273   - 

Subordinated debentures

  79,944   77,968   -   77,968   - 

Accrued interest payable

  9,320   9,320   -   9,320   -