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Note 3 - Loans - Summary of Collateral Types (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Financing receivable, gross | $ 12,605,836 | $ 11,658,829 |  |
Financing Receivable, Allowance for Credit Loss | 164,458 | 153,317 | $ 146,297 | $ 116,660
Consumer | 164,458 | 153,317 | 146,297 | 116,660
Real Estate [Member] |  |  |  |
Financing receivable, gross | 64,678 | 54,005 |  |
Collateral, Accounts Receivable [Member] |  |  |  |
Financing receivable, gross | 1,721 | 7,240 |  |
Equipment [Member] |  |  |  |
Financing receivable, gross | 7,558 | 2,126 |  |
Collateral, Other [Member] |  |  |  |
Financing receivable, gross | 45,338 | 25,692 |  |
Collateral Pledged [Member] |  |  |  |
Financing receivable, gross | 119,295 | 89,063 |  |
Financing Receivable, Allowance for Credit Loss | 23,628 | 18,326 |  |
Consumer | 23,628 | 18,326 |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing receivable, gross | 2,869,894 | 2,823,986 |  |
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] |  |  |  |
Financing receivable, gross | 18,901 | 20,266 |  |
Commercial Real Estate Portfolio Segment [Member] | Collateral, Accounts Receivable [Member] |  |  |  |
Financing receivable, gross | 1,721 | 7,240 |  |
Commercial Real Estate Portfolio Segment [Member] | Equipment [Member] |  |  |  |
Financing receivable, gross | 7,449 | 2,126 |  |
Commercial Real Estate Portfolio Segment [Member] | Collateral, Other [Member] |  |  |  |
Financing receivable, gross | 42,684 | 24,016 |  |
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged [Member] |  |  |  |
Financing receivable, gross | 70,755 | 53,648 |  |
Financing Receivable, Allowance for Credit Loss | 17,615 | 16,189 |  |
Consumer | 17,615 | 16,189 |  |
Real Estate Portfolio Segment[Member] |  |  |  |
Financing receivable, gross | 8,173,009 | 7,251,447 |  |
Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |  |  |
Financing receivable, gross | 1,489,306 | 1,519,619 |  |
Financing Receivable, Allowance for Credit Loss | 38,597 | 44,658 | 42,889 | 26,994
Consumer | 38,597 | 44,658 | 42,889 | 26,994
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 2,547,143 | 2,257,163 |  |
Financing Receivable, Allowance for Credit Loss | 22,302 | 17,702 | 16,843 | 16,204
Consumer | 22,302 | 17,702 | 16,843 | 16,204
Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |  |  |
Financing receivable, gross | 1,444,623 | 1,249,938 |  |
Financing Receivable, Allowance for Credit Loss | 14,096 | 12,029 | 12,219 | 6,978
Consumer | 14,096 | 12,029 | 12,219 | 6,978
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 4,181,243 | 3,744,346 |  |
Financing Receivable, Allowance for Credit Loss | 31,328 | 25,395 | 29,590 | 22,647
Consumer | 31,328 | 25,395 | 29,590 | 22,647
Real Estate Portfolio Segment[Member] | Other Mortgages [Member] |  |  |  |
Financing receivable, gross | 8,173,009 |  |  |
Real Estate Portfolio Segment[Member] | Real Estate [Member] | Construction Loans [Member] |  |  |  |
Financing receivable, gross | 2,590 | 145 |  |
Real Estate Portfolio Segment[Member] | Real Estate [Member] | Owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 24,935 | 12,038 |  |
Real Estate Portfolio Segment[Member] | Real Estate [Member] | One to Four Family [Member] |  |  |  |
Financing receivable, gross | 3,719 | 15,694 |  |
Real Estate Portfolio Segment[Member] | Real Estate [Member] | Non-owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 14,533 | 5,862 |  |
Real Estate Portfolio Segment[Member] | Real Estate [Member] | Other Mortgages [Member] |  |  |  |
Financing receivable, gross | 43,187 | 33,594 |  |
Real Estate Portfolio Segment[Member] | Collateral, Accounts Receivable [Member] | Construction Loans [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Accounts Receivable [Member] | Owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Accounts Receivable [Member] | One to Four Family [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Accounts Receivable [Member] | Non-owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Accounts Receivable [Member] | Other Mortgages [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Equipment [Member] | Construction Loans [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Equipment [Member] | Owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Equipment [Member] | One to Four Family [Member] |  |  |  |
Financing receivable, gross | 109 | 0 |  |
Real Estate Portfolio Segment[Member] | Equipment [Member] | Non-owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Equipment [Member] | Other Mortgages [Member] |  |  |  |
Financing receivable, gross | 109 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Other [Member] | Construction Loans [Member] |  |  |  |
Financing receivable, gross | 946 | 978 |  |
Real Estate Portfolio Segment[Member] | Collateral, Other [Member] | Owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 78 | 698 |  |
Real Estate Portfolio Segment[Member] | Collateral, Other [Member] | One to Four Family [Member] |  |  |  |
Financing receivable, gross | 0 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Other [Member] | Non-owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 875 | 0 |  |
Real Estate Portfolio Segment[Member] | Collateral, Other [Member] | Other Mortgages [Member] |  |  |  |
Financing receivable, gross | 953 | 698 |  |
Real Estate Portfolio Segment[Member] | Collateral Pledged [Member] | Construction Loans [Member] |  |  |  |
Financing receivable, gross | 3,536 | 1,123 |  |
Financing Receivable, Allowance for Credit Loss | 0 | 1 |  |
Consumer | 0 | 1 |  |
Real Estate Portfolio Segment[Member] | Collateral Pledged [Member] | Owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 25,013 | 12,736 |  |
Financing Receivable, Allowance for Credit Loss | 2,890 | 475 |  |
Consumer | 2,890 | 475 |  |
Real Estate Portfolio Segment[Member] | Collateral Pledged [Member] | One to Four Family [Member] |  |  |  |
Financing receivable, gross | 3,828 | 15,694 |  |
Financing Receivable, Allowance for Credit Loss | 287 | 1,058 |  |
Consumer | 287 | 1,058 |  |
Real Estate Portfolio Segment[Member] | Collateral Pledged [Member] | Non-owner Occupied Commercial [Member] |  |  |  |
Financing receivable, gross | 15,408 | 5,862 |  |
Financing Receivable, Allowance for Credit Loss | 2,081 | 603 |  |
Consumer | 2,081 | 603 |  |
Real Estate Portfolio Segment[Member] | Collateral Pledged [Member] | Other Mortgages [Member] |  |  |  |
Financing receivable, gross | 44,249 | 34,291 |  |
Financing Receivable, Allowance for Credit Loss | 5,258 | 2,136 |  |
Consumer | 5,258 | 2,136 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Financing receivable, gross | 73,627 | 63,777 |  |
Financing Receivable, Allowance for Credit Loss | 2,805 | 1,412 | 1,926 | 1,968
Consumer | 2,805 | $ 1,412 | $ 1,926 | $ 1,968
Consumer Portfolio Segment [Member] | Real Estate [Member] |  |  |  |
Financing receivable, gross | 0 |  |  |
Consumer Portfolio Segment [Member] | Collateral, Accounts Receivable [Member] |  |  |  |
Financing receivable, gross | 0 |  |  |
Consumer Portfolio Segment [Member] | Equipment [Member] |  |  |  |
Financing receivable, gross | 0 |  |  |
Consumer Portfolio Segment [Member] | Collateral, Other [Member] |  |  |  |
Financing receivable, gross | 755 |  |  |
Consumer Portfolio Segment [Member] | Collateral Pledged [Member] |  |  |  |
Financing receivable, gross | 755 |  |  |
Financing Receivable, Allowance for Credit Loss | 755 |  |  |
Consumer | $ 755 |  |  |

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