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Note 5 - Loans (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Servicing Asset | $ 203,000 | $ 181,400 |
Financing Receivable, Nonaccrual | 66,681 | 68,854 |
Financing Receivable, Nonaccrual, Average Recorded Investment | 71,830 | 71,371 |
Financing Receivable, Nonaccrual, Interest Income | $ 321 | $ 435 | $ 1,074
Percentage Of Charge Off To Contractual Balances For Impaired Loans | 15.80% | 14.10% |
Financing Receivables, Impaired, Troubled Debt Restructuring, Specific Reserve |  | $ 427 | 0
Financing Receivable, Modified, Subsequent Default | $ 0 | $ 0 |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 0 |  |
Minimum [Member] |  |  |
Period Loan Is In Payment Default (Day) | 60 days | 60 days |
Maximum [Member] |  |  |
Period Loan Is In Payment Default (Day) | 90 days | 90 days |
Accruing Troubled Debt Restructuring [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring |  | $ 15,100 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Specific Reserve |  | 0 |
Non-accruing Troubled Debt Restructuring [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring |  | 6,300 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Specific Reserve |  | 427 |
Residential Portfolio Segment [Member] |  |  |
Servicing Asset | $ 70,700 | 80,200 |
Repossessed Assets | 242 | 456 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Servicing Asset | 76,100 | 51,600 |
Financing Receivable, Nonaccrual, Average Recorded Investment | 35,742 | 14,251 |
Financing Receivable, Nonaccrual, Interest Income | 318 | 405 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Specific Reserve |  | 0 |
Commercial Construction Loans [Member] |  |  |
Servicing Asset | 11,800 | 2,500 |
Commercial Portfolio Segment [Member] |  |  |
Servicing Asset | 44,400 | 47,100 |
Financing Receivable, Nonaccrual, Average Recorded Investment | 18,008 | 28,109 |
Financing Receivable, Nonaccrual, Interest Income | 3 | 4 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Specific Reserve |  | 427 | $ 0
Real Estate Loan [Member] |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | 14,150,000 | 13,070,000 |
Commercial Loans [Member] |  |  |
Loans Pledged with Federal Reserve Bank | $ 388 | $ 583 |

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