Note 3 - Investment Securities - Scheduled Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Due in one year or less, amortized cost	$ 3,450
Due in one year or less, fair value	3,444
Due after one year through five years, amortized cost	4,876
Due after one year through five years, fair value	4,880
Due after five years through ten years, amortized cost	3,765
Due after five years through ten years, fair value	3,788
Due after ten years, amortized cost	212,474
Due after ten years, fair value	196,197
Total securities available-for-sale, amortized cost	731,131	$ 535,182
Total securities available-for-sale, fair value	675,941	534,507
Residential Mortgage-Backed Securities [Member]
Securities available-for-sale, without single maturity date, amortized cost	480,445
Securities available-for-sale, without single maturity date, fair value	444,280
Total securities available-for-sale, amortized cost	480,445	317,111
Total securities available-for-sale, fair value	444,280	316,095
Commercial Mortgage-Backed Securities [Member]
Securities available-for-sale, without single maturity date, amortized cost	25,627
Securities available-for-sale, without single maturity date, fair value	22,858
Total securities available-for-sale, amortized cost	25,627	10,814
Total securities available-for-sale, fair value	22,858	10,469
Other Debt Obligations [Member]
Securities available-for-sale, without single maturity date, amortized cost	494
Securities available-for-sale, without single maturity date, fair value	494
Total securities available-for-sale, amortized cost	494	195
Total securities available-for-sale, fair value	$ 494	$ 195