Note 8 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)		Dec. 31, 2020 USD ($)
Number of Reportable Segments	1
Goodwill, Ending Balance	$ 129,565	$ 129,565	[1]	$ 129,570
Amortization of Intangible Assets	$ 1,446	$ 1,446		$ 1,450
Core Deposits [Member]
Finite-Lived Intangible Assets, Remaining Amortization Period (Year)	5 years 10 months 13 days
Core Deposits [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	2 years 6 months
Core Deposits [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years

[1] Derived from audited financial statements