Note 7 - Goodwill and Other Intangible Assets - Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance, goodwill	$ 85,048	$ 85,048
Balance, intangibles	4,627
Amortization, intangibles	(1,260)	(1,464)	$ (1,637)
Balance, goodwill	85,048	85,048	85,048
Balance, intangibles	3,367	4,627
Core deposit intangibles, net	3,367	4,627
Goodwill, gross	85,048	85,048
Goodwill, net	85,048	85,048	$ 85,048
Core Deposits [Member]
Balance, intangibles	4,627
Balance, intangibles	3,367	4,627
Core deposit intangibles, gross	19,708	19,708
Core deposit intangibles, accumulated amortization	(16,341)	(15,081)
Core deposit intangibles, net	$ 3,367	$ 4,627