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Note 12 - Commitments and Off-balance-sheet Risk (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Summary of Contractual Amounts of Financial Instruments With Off Balance Sheet Risk [Table Text Block]

(Dollars in thousands)

 2024  2023 
         

Commercial unused lines of credit

 $1,488,782  $1,557,429 

Unused lines of credit secured by 1 – 4 family residential properties

  84,298   74,120 

Credit card unused lines of credit

  172,273   142,096 

Other consumer unused lines of credit

  33,892   50,063 

Commitments to make loans

  295,566   270,403 

Standby letters of credit

  26,491   19,393 
         

Total commitments

 $2,101,302  $2,113,504 
Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]

(Dollars in thousands)

 December 31, 2024  December 31, 2023 
  

Contract

  

Carrying

  

Contract

  

Carrying

 
  

Amount

  

Value

  

Amount

  

Value

 
                 

Standby letters of credit

 $26,491  $175  $19,393  $99