v3.26.3
Note 7 - Loans and the Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process $ 11,435,643 $ 11,457,558
Real Estate [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 123,316 254,710
Other Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 8,463 8,783
Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 131,779 263,493
Commercial Portfolio Segment [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 1,656,916 1,565,963
Commercial Portfolio Segment [Member] | Real Estate [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 5,033 6,948
Commercial Portfolio Segment [Member] | Other Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 8,463 8,783
Commercial Portfolio Segment [Member] | Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 13,496 15,731
Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 7,981,622 8,054,696
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 113,845 242,125
Commercial Real Estate Portfolio Segment [Member] | Other Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 0 0
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 113,845 242,125
Residential Portfolio Segment [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 1,207,092 1,210,980
Residential Portfolio Segment [Member] | Real Estate [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 4,438 5,637
Residential Portfolio Segment [Member] | Other Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process 0 0
Residential Portfolio Segment [Member] | Collateral Pledged [Member]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process $ 4,438 $ 5,637