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Note 3 - Loans - Summary of Collateral Types (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing receivable, gross | $ 13,696,912 | $ 12,605,836
Commercial Real Estate Portfolio Segment [Member] |  |
Financing receivable, gross | 3,146,736 | 2,869,894
Real Estate Portfolio Segment[Member] |  |
Financing receivable, gross | 9,014,925 | 8,173,009
Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |
Financing receivable, gross | 1,457,628 | 1,489,306
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |
Financing receivable, gross | 2,739,823 | 2,547,143
Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |
Financing receivable, gross | 1,671,713 | 1,444,623
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |
Financing receivable, gross | 4,603,389 | 4,181,243
Consumer Portfolio Segment [Member] |  |
Financing receivable, gross | 77,623 | 73,627
Real Estate [Member] |  |
Financing receivable, gross | 173,618 | 64,678
Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |
Financing receivable, gross | 18,792 | 18,901
Real Estate [Member] | Real Estate Portfolio Segment[Member] |  |
Financing receivable, gross | 118,880 | 43,187
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |
Financing receivable, gross | 35,946 | 2,590
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |
Financing receivable, gross | 21,076 | 24,935
Real Estate [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |
Financing receivable, gross | 9,887 | 3,719
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |
Financing receivable, gross | 87,917 | 14,533
Real Estate [Member] | Consumer Portfolio Segment [Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Accounts Receivable [Member] |  |
Financing receivable, gross | 2,247 | 1,721
Collateral, Accounts Receivable [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |
Financing receivable, gross | 2,247 | 1,721
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Accounts Receivable [Member] | Consumer Portfolio Segment [Member] |  |
Financing receivable, gross | 0 | 0
Equipment [Member] |  |
Financing receivable, gross | 2,887 | 7,558
Equipment [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |
Financing receivable, gross | 2,763 | 7,449
Equipment [Member] | Real Estate Portfolio Segment[Member] |  |
Financing receivable, gross | 109 | 109
Equipment [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |
Financing receivable, gross | 0 | 0
Equipment [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |
Financing receivable, gross | 0 | 0
Equipment [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |
Financing receivable, gross | 109 | 109
Equipment [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |
Financing receivable, gross | 0 | 0
Equipment [Member] | Consumer Portfolio Segment [Member] |  |
Financing receivable, gross | 15 | 0
Collateral, Other [Member] |  |
Financing receivable, gross | 32,851 | 45,338
Collateral, Other [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |
Financing receivable, gross | 30,235 | 42,684
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] |  |
Financing receivable, gross | 951 | 953
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |
Financing receivable, gross | 944 | 946
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |
Financing receivable, gross | 76 | 78
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |
Financing receivable, gross | 0 | 0
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |
Financing receivable, gross | 875 | 875
Collateral, Other [Member] | Consumer Portfolio Segment [Member] |  |
Financing receivable, gross | 721 | 755
Collateral Pledged [Member] |  |
Financing receivable, gross | 211,603 | 119,295
Financing Receivable, Allowance for Credit Loss | 24,778 | 23,628
Collateral Pledged [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |
Financing receivable, gross | 54,037 | 70,755
Financing Receivable, Allowance for Credit Loss | 17,465 | 17,615
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] |  |
Financing receivable, gross | 119,940 | 44,249
Financing Receivable, Allowance for Credit Loss | 5,880 | 5,258
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |
Financing receivable, gross | 36,890 | 3,536
Financing Receivable, Allowance for Credit Loss | 712 | 0
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |
Financing receivable, gross | 21,152 | 25,013
Financing Receivable, Allowance for Credit Loss | 0 | 2,890
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |
Financing receivable, gross | 9,996 | 3,828
Financing Receivable, Allowance for Credit Loss | 446 | 287
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |
Financing receivable, gross | 88,792 | 15,408
Financing Receivable, Allowance for Credit Loss | 5,434 | 2,081
Collateral Pledged [Member] | Consumer Portfolio Segment [Member] |  |
Financing receivable, gross | 736 | 755
Financing Receivable, Allowance for Credit Loss | $ 721 | $ 755

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