Note 20 - Dividend Restrictions and Regulatory Capital - Actual and Required Capital Amounts (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Company [Member]
Common equity tier 1, actual amount	$ 287,735	$ 270,192
Common equity tier 1, actual ratio	0.1170	0.1243
Common equity tier 1, required for capital adequacy purposes, amount	$ 172,098	$ 97,798
Common equity tier 1, required for capital adequacy purposes, ratio	0.0700	0.0700
Tier 1 capital, actual amount	$ 316,069	$ 298,424
Tier 1 capital, actual ratio	0.1286	0.1373
Tier 1 capital, required for capital adequacy purposes, amount	$ 208,977	$ 130,397
Tier 1 capital, required for capital adequacy purposes, ratio	0.0850	0.0850
Total capital, actual amount	$ 336,001	$ 317,488
Total capital, actual ratio	0.1367	0.1461
Total capital, required for capital adequacy purposes, amount	$ 258,147	$ 173,862
Total capital, required for capital adequacy purposes, ratio	0.1050	0.1050
Leverage capital, actual amount	$ 316,069	$ 298,424
Leverage capital, actual ratio	0.1036	0.0913
Leverage capital, required for capital adequacy purposes, amount	$ 122,086	$ 130,722
Leverage capital, required for capital adequacy purposes, ratio	0.0400	0.0400
Bank [Member]
Common equity tier 1, actual amount	$ 308,690	$ 285,260
Common equity tier 1, actual ratio	0.1257	0.1315
Common equity tier 1, required for capital adequacy purposes, amount	$ 171,962	$ 151,845
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	$ 159,679	$ 140,999
Common equity tier 1, to be well capitalized under prompt corrective action provisions, ratio	0.0650	0.0650
Tier 1 capital, actual amount	$ 308,690	$ 285,260
Tier 1 capital, actual ratio	0.1257	0.1315
Total capital, required for capital adequacy with buffer purposes, amount	$ 208,811	$ 184,383
Tier 1 capital, required for capital adequacy purposes with buffer, ratio	0.0850	8.50
Tier 1 capital, to be well capitalized under prompt corrective action provisions, amount	$ 196,528	$ 173,537
Tier 1 capital, to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Total capital, actual amount	$ 328,622	$ 304,324
Total capital, actual ratio	0.1338	0.1403
Total capital, required for capital adequacy purposes, amount	$ 257,942	$ 277,767
Total capital, required for capital adequacy purposes, ratio	0.1050	0.1050
Total capital, to be well capitalized under prompt corrective action provisions, amount	$ 245,660	$ 216,921
Total capital, to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Leverage capital, actual amount	$ 308,690	$ 285,260
Leverage capital, actual ratio	0.1012	0.0876
Leverage capital, required for capital adequacy purposes, amount	$ 121,990	$ 130,264
Leverage capital, required for capital adequacy purposes, ratio	0.0400	0.0400
Leverage capital, to be well capitalized under prompt corrective action provisions, amount	$ 152,488	$ 162,830
Leverage capital, to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500