Note 3 - Loans Receivable and Allowance for Credit Losses - Loans - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Gross	$ 2,660,157	$ 2,655,109
Commercial Real Estate [Member]
Financing Receivable, Gross	7,778	11,285
Residential Real Estate [Member]
Financing Receivable, Gross	2,445	2,168
Other Nonreal Estate [Member]
Financing Receivable, Gross	5,405	5,108
Collateral Dependent Loans [Member]
Financing Receivable, Gross	15,628	18,561
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Gross	1,004,990	969,471
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	7,778	11,285
Commercial Real Estate Portfolio Segment [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	7,778	11,285
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Financing Receivable, Gross	184,136	176,078
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	614	2,049
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	614	2,049
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member]
Financing Receivable, Gross	370,459	354,130
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	7,164	9,236
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Speculative Construction and Development [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	7,164	9,236
Residential Portfolio Segment [Member]
Financing Receivable, Gross	793,497	759,361
Residential Portfolio Segment [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	2,445	2,168
Residential Portfolio Segment [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	2,445	2,168
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Financing Receivable, Gross	660,518	628,761
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	1,973	1,778
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	1,973	1,778
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Financing Receivable, Gross	88,214	88,271
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	472	390
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	0
Residential Portfolio Segment [Member] \| Home Equity Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	472	390
Consumer Portfolio Segment [Member]
Financing Receivable, Gross	573,203	596,986
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	5,405	4,710
Consumer Portfolio Segment [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	5,405	4,710
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member]
Financing Receivable, Gross	502,151	525,842
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	4,799	4,256
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	4,799	4,256
Consumer Portfolio Segment [Member] \| Marine Loans [Member]
Financing Receivable, Gross	66,941	68,115
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	606	454
Consumer Portfolio Segment [Member] \| Marine Loans [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	606	454
Commercial Business Portfolio Segment [Member]
Financing Receivable, Gross	288,467	329,291
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member]
Financing Receivable, Gross	281,181	301,111
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Commercial Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Residential Real Estate [Member]
Financing Receivable, Gross	0	0
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Other Nonreal Estate [Member]
Financing Receivable, Gross	0	398
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member] \| Collateral Dependent Loans [Member]
Financing Receivable, Gross	$ 0	$ 398

Note 3 - Loans Receivable and Allowance for Credit Losses - Loans - Schedule of Collateral Dependent Loans (Details) - USD ($)
$ in Thousands

Jun. 30, 2026

Dec. 31, 2025

Financing Receivable, Gross

$ 2,660,157

$ 2,655,109

Commercial Real Estate [Member]

Financing Receivable, Gross

7,778

11,285

Residential Real Estate [Member]

Financing Receivable, Gross