Note 3 - Loans Receivable and Allowance for Credit Losses - Loans - Schedule of Portfolio Loan Composition (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Gross	$ 2,660,157		$ 2,655,109
ACL on loans	(31,165)	$ (32,443)	(31,937)	$ (32,189)	$ (31,653)	$ (31,870)
Total loans receivable, net	2,628,992		2,623,172
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Gross	1,004,990		969,471
ACL on loans	(5,161)	(6,557)	(5,959)	(7,070)	(6,904)	(7,001)
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Financing Receivable, Gross	184,136		176,078
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member]
Financing Receivable, Gross	188,258		177,113
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] \| Multifamily [Member]
Financing Receivable, Gross	262,137		262,150
Residential Portfolio Segment [Member]
Financing Receivable, Gross	793,497		759,361
ACL on loans	(7,518)	(7,405)	(7,402)	(7,654)	(7,475)	(7,440)
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Financing Receivable, Gross	660,518		628,761
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Financing Receivable, Gross	88,214		88,271
Residential Portfolio Segment [Member] \| Custom Construction [Member]
Financing Receivable, Gross	44,765		42,329
Consumer Portfolio Segment [Member]
Financing Receivable, Gross	573,203		596,986
ACL on loans	(16,699)	(16,661)	(15,934)	(15,075)	(14,856)	(14,185)
Consumer Portfolio Segment [Member] \| Indirect Home Improvement Loan [Member]
Financing Receivable, Gross	502,151		525,842
Consumer Portfolio Segment [Member] \| Marine Loans [Member]
Financing Receivable, Gross	66,941		68,115
Consumer Portfolio Segment [Member] \| Other Consumer Loan [Member]
Financing Receivable, Gross	4,111		3,029
Commercial Business Portfolio Segment [Member]
Financing Receivable, Gross	288,467		329,291
ACL on loans	(1,787)	$ (1,820)	(2,642)	$ (2,390)	$ (2,418)	$ (3,244)
Commercial Business Portfolio Segment [Member] \| Commercial And Industrial [Member]
Financing Receivable, Gross	281,181		301,111
Commercial Business Portfolio Segment [Member] \| Warehouse Lending Loan [Member]
Financing Receivable, Gross	$ 7,286		$ 28,180