Note 20 - Dividend Restrictions and Regulatory Capital - Actual and Required Capital Amounts (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Company [Member]
Common equity tier 1, actual amount	$ 270,192	$ 244,318
Common equity tier 1, actual ratio	0.1243	0.1236
Common equity tier 1, required for capital adequacy purposes, amount	$ 97,798	$ 88,967
Common equity tier 1, required for capital adequacy purposes, ratio	0.0700	0.0700
Tier 1 capital, actual amount	$ 298,424	$ 272,448
Tier 1 capital, actual ratio	0.1373	0.1378
Tier 1 capital, required for capital adequacy purposes, amount	$ 130,397	$ 118,623
Tier 1 capital, required for capital adequacy purposes, ratio	0.0850	0.0850
Total capital, actual amount	$ 317,488	$ 300,155
Total capital, actual ratio	0.1461	0.1518
Total capital, required for capital adequacy purposes, amount	$ 173,862	$ 158,164
Total capital, required for capital adequacy purposes, ratio	0.1050	0.1050
Leverage capital, actual amount	$ 298,424	$ 272,448
Leverage capital, actual ratio	0.0913	0.0948
Leverage capital, required for capital adequacy purposes, amount	$ 130,722	$ 114,902
Leverage capital, required for capital adequacy purposes, ratio	0.0400	0.0400
Bank [Member]
Common equity tier 1, actual amount	$ 285,260	$ 252,748
Common equity tier 1, actual ratio	0.1315	0.1286
Common equity tier 1, required for capital adequacy purposes, amount	$ 151,845	$ 137,530
Common equity tier 1, required for capital adequacy purposes, ratio	0.0700	0.0700
Common equity tier 1, to be well capitalized under prompt corrective action provisions, amount	$ 140,999	$ 127,706
Common equity tier 1, to be well capitalized under prompt corrective action provisions, ratio	0.0650	0.0650
Tier 1 capital, actual amount	$ 285,260	$ 252,748
Tier 1 capital, actual ratio	0.1315	0.1286
Tier 1 capital, required for capital adequacy purposes, amount	$ 184,383	$ 167,001
Tier 1 capital, required for capital adequacy purposes, ratio	0.0850	0.0850
Tier 1 capital, to be well capitalized under prompt corrective action provisions, amount	$ 173,537	$ 157,177
Tier 1 capital, to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Total capital, actual amount	$ 304,324	$ 274,455
Total capital, actual ratio	0.1403	0.1397
Total capital, required for capital adequacy purposes, amount	$ 277,767	$ 206,295
Total capital, required for capital adequacy purposes, ratio	0.1050	0.1050
Total capital, to be well capitalized under prompt corrective action provisions, amount	$ 216,921	$ 196,471
Total capital, to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Leverage capital, actual amount	$ 285,260	$ 252,748
Leverage capital, actual ratio	0.0876	0.0885
Leverage capital, required for capital adequacy purposes, amount	$ 130,264	$ 114,247
Leverage capital, required for capital adequacy purposes, ratio	0.0400	0.0400
Leverage capital, to be well capitalized under prompt corrective action provisions, amount	$ 162,830	$ 142,809
Leverage capital, to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500