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Note 4 - Loans Receivable and Allowance for Credit Losses on Loans - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Gross | $ 2,446,858 | $ 2,433,015
Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 5,839 | 5,787
Residential Real Estate [Member] |  |
Financing Receivable, Gross | 343 | 269
Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 5,921 | 4,888
Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 12,103 | 10,944
Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Gross | 1,536,184 | 1,530,381
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 5,839 | 5,787
Real Estate Portfolio Segment [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 343 | 269
Real Estate Portfolio Segment [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 6,182 | 6,056
Real Estate Portfolio Segment [Member] | Commercial Loan [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 1,102 | 1,088
Real Estate Portfolio Segment [Member] | Commercial Loan [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | Commercial Loan [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | Commercial Loan [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 1,102 | 1,088
Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable, Gross | 301,346 | 303,054
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 4,737 | 4,699
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 0 |
Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 4,737 | 4,699
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Gross | 73,323 | 69,488
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 170 | 173
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 170 | 173
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] |  |
Financing Receivable, Gross | 580,050 | 567,742
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 173 | 96
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 173 | 96
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Gross | 646,132 | 646,753
Consumer Portfolio Segment [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Consumer Portfolio Segment [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Consumer Portfolio Segment [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 2,580 | 2,205
Consumer Portfolio Segment [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 2,580 | 2,205
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] |  |
Financing Receivable, Gross | 568,802 | 569,903
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 2,195 | 1,863
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 2,195 | 1,863
Consumer Portfolio Segment [Member] | Marine Loans [Member] |  |
Financing Receivable, Gross | 73,921 | 73,310
Consumer Portfolio Segment [Member] | Marine Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Consumer Portfolio Segment [Member] | Marine Loans [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Consumer Portfolio Segment [Member] | Marine Loans [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 385 | 342
Consumer Portfolio Segment [Member] | Marine Loans [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | 385 | 342
Commercial Business Portfolio Segment [Member] |  |
Financing Receivable, Gross | 264,542 | 255,881
Commercial Business Portfolio Segment [Member] | Commercial Loan [Member] |  |
Financing Receivable, Gross | 256,429 | 238,301
Commercial Business Portfolio Segment [Member] | Commercial Loan [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Commercial Business Portfolio Segment [Member] | Commercial Loan [Member] | Residential Real Estate [Member] |  |
Financing Receivable, Gross | 0 | 0
Commercial Business Portfolio Segment [Member] | Commercial Loan [Member] | Other Nonreal Estate [Member] |  |
Financing Receivable, Gross | 3,341 | 2,683
Commercial Business Portfolio Segment [Member] | Commercial Loan [Member] | Collateral Dependent Loans [Member] |  |
Financing Receivable, Gross | $ 3,341 | $ 2,683

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