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Note 21 - Regulatory Matters - Actual Capital Levels and Minimum Levels (Details)
$ in Thousands
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Total capital minimum required for capital adequacy, ratio 0.105  
Tier 1 capital minimum required for capital adequacy, ratio 0.085  
Common equity tier 1 capital minimum required for capital adequacy, ratio 0.070  
Consolidated Entities [Member]    
Total capital, amount $ 634,729 $ 565,143
Total capital, ratio 0.140 0.140
Total capital minimum required for capital adequacy, amount $ 362,675 $ 324,101
Total capital minimum required for capital adequacy, ratio 0.080 0.080
Tier 1 capital, amount $ 503,855 $ 456,133
Tier 1 capital, ratio 0.111 0.113
Tier 1 capital minimum required for capital adequacy, amount $ 272,007 $ 243,076
Tier 1 capital minimum required for capital adequacy, ratio 0.060 0.060
Common equity tier 1, amount $ 456,970 $ 409,963
Common equity tier 1, ratio 0.101 0.101
Common equity tier 1 minimum required for capital adequacy, amount $ 204,005 $ 182,307
Common equity tier 1 capital minimum required for capital adequacy, ratio 0.045 0.045
Tier 1 capital to average assets, amount $ 503,855 $ 456,133
Tier 1 capital to average assets, ratio 0.101 0.092
Tier 1 capital to average assets, minimum required for capital adequacy, amount $ 199,647 $ 198,574
Tier 1 capital to average assets minimum required for capital adequacy, ratio 0.040 0.040
Bank [Member]    
Total capital, amount $ 618,709 $ 551,760
Total capital, ratio 0.137 0.136
Total capital minimum required for capital adequacy, amount $ 362,490 $ 323,928
Total capital minimum required for capital adequacy, ratio 0.080 0.080
Total capital to be well capitalized, amount $ 453,112 $ 404,910
Total capital to be well capitalized, ratio 0.100 0.100
Tier 1 capital, amount $ 576,463 $ 516,397
Tier 1 capital, ratio 0.127 0.128
Tier 1 capital minimum required for capital adequacy, amount $ 271,868 $ 242,946
Tier 1 capital minimum required for capital adequacy, ratio 0.060 0.060
Tier 1 capital to be well capitalized, amount $ 362,490 $ 323,928
Tier 1 capital to be well capitalized, ratio 0.080 0.080
Common equity tier 1, amount $ 576,463 $ 516,397
Common equity tier 1, ratio 0.127 0.128
Common equity tier 1 minimum required for capital adequacy, amount $ 203,901 $ 182,210
Common equity tier 1 capital minimum required for capital adequacy, ratio 0.045 0.045
Common equity tier 1 capital to be well capitalized, amount $ 294,523 $ 263,192
Common equity tier 1 capital to be well capitalized, ratio 0.065 0.065
Tier 1 capital to average assets, amount $ 576,463 $ 516,397
Tier 1 capital to average assets, ratio 0.116 0.104
Tier 1 capital to average assets, minimum required for capital adequacy, amount $ 199,563 $ 198,510
Tier 1 capital to average assets minimum required for capital adequacy, ratio 0.040 0.040
Tier 1 capital to average assets to be well capitalized, amount $ 249,453 $ 248,137
Tier 1 capital to average assets to be well capitalized, ratio 0.050 0.050