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Note 3 - Loans - Analysis of Allowance for Loans Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Balance, beginning of year | $ 146,297 | [1] | $ 116,660 |  | $ 87,942
Charge-offs | (14,581) |  |  |  |
Recoveries | 2,886 |  | 2,167 |  | 1,315
Provision for credit losses | 18,715 |  | 37,607 |  | 31,517
Balance, end of year | 153,317 |  | 146,297 | [1] | 116,660
Charge-offs | (14,581) |  | (10,137) |  | (4,114)
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Charge-offs | (13,229) |  |  |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |  |  |  |
Balance, beginning of year | 42,830 |  | 41,869 |  | 36,370
Charge-offs | (13,229) |  |  |  |
Recoveries | 2,796 |  | 2,012 |  | 1,135
Provision for credit losses | 19,720 |  | 8,205 |  | 7,817
Balance, end of year | 52,117 |  | 42,830 |  | 41,869
Charge-offs |  |  | (9,256) |  | (3,453)
Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |  |  |  |
Balance, beginning of year | 42,889 |  | 26,994 |  | 16,057
Charge-offs | (108) |  |  |  |
Recoveries | 3 |  | 0 |  | 52
Provision for credit losses | 1,874 |  | 15,895 |  | 10,899
Balance, end of year | 44,658 |  | 42,889 |  | 26,994
Charge-offs | (108) |  | 0 |  | (14)
Real Estate Portfolio Segment[Member] | Real Estate Loan [Member] |  |  |  |  |
Balance, beginning of year | 58,652 |  | 45,829 |  | 33,722
Charge-offs | (171) |  |  |  |
Recoveries | 2 |  | 0 |  | 85
Provision for credit losses | (3,355) |  | 13,044 |  | 12,301
Balance, end of year | 55,128 |  | 58,652 |  | 45,829
Charge-offs |  |  | (221) |  | (279)
Consumer Portfolio Segment [Member] |  |  |  |  |
Balance, beginning of year | 1,926 |  | 1,968 |  | 1,793
Charge-offs | (1,073) |  |  |  |
Recoveries | 85 |  | 155 |  | 43
Provision for credit losses | 476 |  | 463 |  | 500
Balance, end of year | 1,414 |  | 1,926 |  | 1,968
Charge-offs | $ (1,073) |  | $ (660) |  | $ (368)
[1] | derived from audited financial statements.

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