Note 4 - Loans - Classification of Loans Outstanding (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Loans receivable	$ 3,251,139	$ 3,248,064
Commercial Portfolio Segment [Member]
Loans receivable	150,587	116,163
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	1,936,691	1,919,714
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans receivable	868,286	857,163
Commercial Real Estate Portfolio Segment [Member] | Other Loan [Member]
Loans receivable	819,682	829,090
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan 1 [Member]
Loans receivable	248,723	233,461
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Loans receivable	1,122,866	1,166,887
Residential Portfolio Segment [Member] | Revolving Home Equity Line [Member]
Loans receivable	39,665	44,070
Consumer And Other Portfolio Segment [Member]
Loans receivable	$ 1,330	$ 1,230