Note 9 - REGULATORY CAPITAL REQUIREMENTS - Capital Requirements (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Total risk-based capital, actual, amount	$ 1,078,343	$ 1,055,177
Total risk-based capital, actual, ratio	0.1468	0.1428
Total risk-based capital for capital adequacy purposes, amount	$ 587,728	$ 591,132
Total risk-based capital for capital adequacy purposes, ratio	0.0800	0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 771,392	$ 775,861
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.1050	0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 734,659	$ 738,915
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 risk-based capital, actual, amount	$ 754,221	$ 734,977
Tier 1 risk-based capital, actual, ratio	0.1027	0.0995
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 440,796	$ 443,349
Tier 1 risk-based capital for capital adequacy purposes, ratio	0.0600	0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 624,460	$ 628,078
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.0850	0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 587,728	$ 591,132
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 754,221	$ 734,977
Tier 1 leverage, actual, ratio	0.0973	0.0961
Tier 1 leverage for capital adequacy purposes, amount	$ 310,214	$ 305,959
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 310,214	$ 305,959
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio	0.0400	0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 387,768	$ 382,449
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 705,587	$ 686,375
Common equity Tier 1, actual ratio	0.0960	0.0929
Common equity Tier 1 for capital adequacy purposes, amount	$ 330,597	$ 332,512
Common equity Tier 1 for capital adequacy purposes, ratio	0.045%	4.50%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 514,262	$ 517,241
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 477,529	$ 480,295
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
QCBT
Total risk-based capital, actual, amount	$ 282,911	$ 275,337
Total risk-based capital, actual, ratio	0.1315	0.1307
Total risk-based capital for capital adequacy purposes, amount	$ 172,050	$ 168,588
Total risk-based capital for capital adequacy purposes, ratio	0.0800	0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 225,816	$ 221,272
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.1050	0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 215,063	$ 210,735
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 risk-based capital, actual, amount	$ 256,016	$ 248,978
Tier 1 risk-based capital, actual, ratio	0.1190	0.1181
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 129,038	$ 126,441
Tier 1 risk-based capital for capital adequacy purposes, ratio	0.0600	0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 182,804	$ 179,125
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.0850	0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 172,050	$ 168,588
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 256,016	$ 248,978
Tier 1 leverage, actual, ratio	0.1106	0.1101
Tier 1 leverage for capital adequacy purposes, amount	$ 92,599	$ 90,419
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 92,599	$ 90,419
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio	0.0400	0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 115,748	$ 133,023
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 256,016	$ 248,978
Common equity Tier 1, actual ratio	0.1190	0.1181
Common equity Tier 1 for capital adequacy purposes, amount	$ 96,778	$ 94,831
Common equity Tier 1 for capital adequacy purposes, ratio	4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 150,544	$ 147,514
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 139,791	$ 136,978
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
CRBT
Total risk-based capital, actual, amount	$ 323,605	$ 308,153
Total risk-based capital, actual, ratio	0.1624	0.1484
Total risk-based capital for capital adequacy purposes, amount	$ 159,422	$ 166,168
Total risk-based capital for capital adequacy purposes, ratio	0.0800	0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 209,241	$ 218,096
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.1050	0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 199,277	$ 207,711
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 risk-based capital, actual, amount	$ 298,757	$ 282,258
Tier 1 risk-based capital, actual, ratio	0.1499	0.1359
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 119,566	$ 124,626
Tier 1 risk-based capital for capital adequacy purposes, ratio	0.0600	0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 169,386	$ 176,554
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.0850	0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 159,422	$ 166,168
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 298,757	$ 282,258
Tier 1 leverage, actual, ratio	0.1395	0.1317
Tier 1 leverage for capital adequacy purposes, amount	$ 85,658	$ 85,707
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 85,658	$ 85,707
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio	0.0400	0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 107,073	$ 107,134
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 298,757	$ 282,258
Common equity Tier 1, actual ratio	0.1499	0.1359
Common equity Tier 1 for capital adequacy purposes, amount	$ 89,675	$ 93,470
Common equity Tier 1 for capital adequacy purposes, ratio	4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 139,494	$ 145,397
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 129,530	$ 135,012
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
CSB
Total risk-based capital, actual, amount	$ 147,754	$ 142,974
Total risk-based capital, actual, ratio	0.1253	0.1204
Total risk-based capital for capital adequacy purposes, amount	$ 94,349	$ 94,981
Total risk-based capital for capital adequacy purposes, ratio	0.0800	0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 123,833	$ 124,662
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.1050	0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 117,936	$ 118,726
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 risk-based capital, actual, amount	$ 133,007	$ 128,130
Tier 1 risk-based capital, actual, ratio	0.1128	0.1079
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 70,762	$ 71,236
Tier 1 risk-based capital for capital adequacy purposes, ratio	0.0600	0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 100,246	$ 100,917
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.0850	0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 94,349	$ 94,981
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 133,007	$ 128,130
Tier 1 leverage, actual, ratio	0.1045	0.1009
Tier 1 leverage for capital adequacy purposes, amount	$ 50,899	$ 50,799
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 50,899	$ 50,799
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio	0.0400	0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 63,624	$ 63,499
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 133,007	$ 128,130
Common equity Tier 1, actual ratio	0.1128	0.1079
Common equity Tier 1 for capital adequacy purposes, amount	$ 53,071	$ 53,427
Common equity Tier 1 for capital adequacy purposes, ratio	4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 82,555	$ 83,108
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 76,659	$ 77,172
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
Guaranty Bank
Total risk-based capital, actual, amount	$ 246,979	$ 243,106
Total risk-based capital, actual, ratio	0.1241	0.1224
Total risk-based capital for capital adequacy purposes, amount	$ 159,267	$ 158,903
Total risk-based capital for capital adequacy purposes, ratio	0.0800	0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 209,038	$ 208,560
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.1050	0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 199,084	$ 198,629
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.1000	0.1000
Tier 1 risk-based capital, actual, amount	$ 223,668	$ 218,647
Tier 1 risk-based capital, actual, ratio	0.1123	0.1101
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 119,450	$ 119,177
Tier 1 risk-based capital for capital adequacy purposes, ratio	0.0600	0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 169,221	$ 168,834
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.0850	0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 159,267	$ 158,903
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 223,668	$ 218,647
Tier 1 leverage, actual, ratio	0.1102	0.1090
Tier 1 leverage for capital adequacy purposes, amount	$ 81,171	$ 80,229
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 81,171	$ 80,229
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio	0.0400	0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 101,464	$ 100,286
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 223,668	$ 218,647
Common equity Tier 1, actual ratio	0.1123	0.1101
Common equity Tier 1 for capital adequacy purposes, amount	$ 89,588	$ 89,383
Common equity Tier 1 for capital adequacy purposes, ratio	4.50%	4.50%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 139,359	$ 139,040
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 129,404	$ 129,109
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%