Quarterly report [Sections 13 or 15(d)]

Note 5 - Loans - Summary of Collateral Types (Details)

v3.26.1
Note 5 - Loans - Summary of Collateral Types (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financing receivable, gross $ 14,478,489 $ 13,696,912
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Commercial Real Estate Portfolio Segment [Member]    
Financing receivable, gross 3,252,437 3,146,736
Real Estate Portfolio Segment[Member]    
Financing receivable, gross 9,590,733 9,014,925
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 1,564,504 1,457,628
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 2,781,375 2,739,823
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 1,685,723 1,671,713
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]    
Financing receivable, gross 5,123,635 4,603,389
Consumer Portfolio Segment [Member]    
Financing receivable, gross 70,815 77,623
Real Estate [Member]    
Financing receivable, gross 164,106 173,618
Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member]    
Financing receivable, gross 10,725 18,792
Real Estate [Member] | Real Estate Portfolio Segment[Member]    
Financing receivable, gross 119,108 118,880
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 34,273 35,946
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 28,367 21,076
Real Estate [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 9,789 9,887
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]    
Financing receivable, gross 80,952 87,917
Real Estate [Member] | Consumer Portfolio Segment [Member]    
Financing receivable, gross 0 0
Collateral, Accounts Receivable [Member]    
Financing receivable, gross 1,277 2,247
Collateral, Accounts Receivable [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member]    
Financing receivable, gross 1,277 2,247
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 2,808 2,887
Equipment [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member]    
Financing receivable, gross 2,700 2,763
Equipment [Member] | Real Estate Portfolio Segment[Member]    
Financing receivable, gross 108 109
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 108 109
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 0 15
Collateral, Other [Member]    
Financing receivable, gross 31,407 32,851
Collateral, Other [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member]    
Financing receivable, gross 28,917 30,235
Collateral, Other [Member] | Real Estate Portfolio Segment[Member]    
Financing receivable, gross 875 951
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 944 944
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 0 76
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 671 721
Collateral Pledged [Member]    
Financing receivable, gross 199,598 211,603
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 31,859 24,778
Collateral Pledged [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member]    
Financing receivable, gross 43,619 54,037
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 10,755 17,465
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member]    
Financing receivable, gross 120,091 119,940
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 8,640 5,880
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Financing receivable, gross 35,217 36,890
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 11,793 712
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Financing receivable, gross 28,367 21,152
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 165 0
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Financing receivable, gross 9,897 9,996
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 303 446
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]    
Financing receivable, gross 81,827 88,792
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 8,172 5,434
Collateral Pledged [Member] | Consumer Portfolio Segment [Member]    
Financing receivable, gross 671 736
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest $ 671 $ 721