Note 3 - Investment Securities - Scheduled Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Due in one year or less, amortized cost	$ 2,000
Due in one year or less, fair value	1,980
Due after one year through five years, amortized cost	6,389
Due after one year through five years, fair value	6,379
Due after five years through ten years, amortized cost	1,851
Due after five years through ten years, fair value	1,857
Due after ten years, amortized cost	200,713
Due after ten years, fair value	174,026
Total investment securities available-for-sale, amortized cost	698,362	$ 721,799
Investment securities	617,162	634,884
Residential Mortgage-Backed Securities [Member]
Securities available-for-sale, without single maturity date, amortized cost	462,004
Securities available-for-sale, without single maturity date, fair value	411,191
Total investment securities available-for-sale, amortized cost	462,004	475,263
Investment securities	411,191	417,578
Commercial Mortgage-Backed Securities [Member]
Securities available-for-sale, without single maturity date, amortized cost	25,240
Securities available-for-sale, without single maturity date, fair value	21,564
Total investment securities available-for-sale, amortized cost	25,240	25,485
Investment securities	21,564	21,104
Other Debt Obligations [Member]
Securities available-for-sale, without single maturity date, amortized cost	165
Securities available-for-sale, without single maturity date, fair value	165
Total investment securities available-for-sale, amortized cost	165	242
Investment securities	$ 165	$ 242

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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