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Note 4 - Loans Receivable and Allowance for Credit Losses on Loans - Schedule of Portfolio Loan Composition (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Gross	$ 2,446,858	$ 2,433,015
ACL on loans	(31,479)	(31,534)
Total loans receivable, net	2,415,379	2,401,481
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	359,055	366,328
Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Gross	301,346	303,054
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Gross	73,323	69,488
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member]
Financing Receivable, Gross	580,050	567,742
Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Gross	222,410	223,769
Consumer Portfolio Segment [Member]
Financing Receivable, Gross	646,132	646,753
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member]
Financing Receivable, Gross	568,802	569,903
Consumer Portfolio Segment [Member] | Marine Loans [Member]
Financing Receivable, Gross	73,921	73,310
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]
Financing Receivable, Gross	3,409	3,540
Commercial Business Portfolio Segment [Member]
Financing Receivable, Gross	264,542	255,881
Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member]
Financing Receivable, Gross	256,429	238,301
Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member]
Financing Receivable, Gross	$ 8,113	$ 17,580

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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