Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans (Details Textual)

v3.22.4
Note 3 - Loans (Details Textual)
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
May 28, 2021
USD ($)
Number of Loans Funded, Payroll Protection Plan       7,400
Amount of Loans Funded, Payment Protection Plan       $ 1,500,000,000
Loans and Leases Receivable, Gross, Total $ 11,687,968,000 $ 9,532,934,000    
Allowance for Loan and Lease Losses, Unfunded Commitments 575,000 1,300,000    
Financing Receivable, Credit Loss, Expense (Reversal) $ 37,607,000 31,517,000 $ 42,434,000  
Financing Receivable, Number of Payment Deferrals 0      
Financing Receivable, Troubled Debt Restructuring $ 2,500,000 $ 2,600,000    
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts 0 0    
Principal and Interest Deferrals [Member]        
Financing Receivable, Number of Payment Deferrals   12    
Financing Receivable, Payment Deferral, Recorded Investment   $ 1,500,000    
Paycheck Protection Program (PPP) Loans [Member]        
Loans and Leases Receivable, Gross, Total $ 2,000,000.0 230,200,000    
Paycheck Protection Program (PPP) Loans [Member] | COVID-19 [Member]        
Interest and Fee Income, Loans, Commercial, Total 7,700,000 27,300,000    
Unfunded Loan Commitment [Member]        
Financing Receivable, Credit Loss, Expense (Reversal) $ 1,400,000 $ 1,700,000