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Note 4 - Investment Securities - Scheduled Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Due in one year or less, amortized cost	$ 3,992
Due in one year or less, fair value	3,996
Due after one year through five years, amortized cost	5,258
Due after one year through five years, fair value	5,254
Due after five years through ten years, amortized cost	10,303
Due after five years through ten years, fair value	8,946
Due after ten years, amortized cost	238,951
Due after ten years, fair value	209,085
Total investment securities available-for-sale, amortized cost	724,723	$ 708,437
Total investment securities available-for-sale, fair value	636,806	612,847
Residential Mortgage-Backed Securities [Member]
Securities available-for-sale, without single maturity date, amortized cost	441,169
Securities available-for-sale, without single maturity date, fair value	388,349
Total investment securities available-for-sale, amortized cost	441,169	439,445
Total investment securities available-for-sale, fair value	388,349	378,838
Commercial Mortgage-Backed Securities [Member]
Securities available-for-sale, without single maturity date, amortized cost	24,925
Securities available-for-sale, without single maturity date, fair value	21,051
Total investment securities available-for-sale, amortized cost	24,925	24,989
Total investment securities available-for-sale, fair value	21,051	20,892
Other Debt Obligations [Member]
Securities available-for-sale, without single maturity date, amortized cost	125
Securities available-for-sale, without single maturity date, fair value	125
Total investment securities available-for-sale, amortized cost	125	171
Total investment securities available-for-sale, fair value	$ 125	$ 171

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