Note 4 - Loans/Leases Receivable - Concentration by Industries (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loan	$ 6,543,416	$ 6,138,871
Lessors of Non-residential Buildings [Member]
Loan	$ 673,719	$ 558,719
Percentage of total loans/leases	10.00%	9.00%
Lessors of Residential Buildings [Member]
Loan	$ 2,328,875	$ 2,168,431
Percentage of total loans/leases	36.00%	35.00%