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Note 6 - Goodwill and Intangibles - Core Deposit Intangibles (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Balance at the beginning of period $ 13,821 $ 16,759  
Acquisition of GFED     $ 63,541
Amortization expense (2,761) (2,938) (2,854)
Balance at the end of the period 11,061 13,821 16,759
Net book value 11,061 13,821 16,759
Core deposit intangibles      
Balance at the beginning of period 13,821 16,759 9,349
Amortization expense (2,760) (2,938) (2,854)
Balance at the end of the period 11,061 13,821 16,759
Gross carrying amount 29,519 29,519 29,519
Accumulated amortization (18,458) (15,698) (12,760)
Net book value $ 11,061 $ 13,821 16,759
Core deposit intangibles | Guaranty Bank      
Acquisition of GFED     $ 10,264