Note 9 - REGULATORY CAPITAL REQUIREMENTS - Capital Requirements (Details) $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Total risk-based capital, actual, amount	$ 1,106,838	$ 1,055,177
Total risk-based capital, actual, ratio	0.1469	0.1428
Total risk-based capital for capital adequacy purposes, amount	$ 602,690	$ 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	$ 791,030	$ 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	$ 753,362	$ 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	$ 781,863	$ 734,977
Tier 1 risk-based capital, actual, ratio	0.1038	0.0995
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 452,017	$ 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	$ 640,358	$ 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	$ 602,690	$ 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	$ 781,863	$ 734,977
Tier 1 leverage, actual, ratio	0.1006	0.0961
Tier 1 leverage for capital adequacy purposes, amount	$ 310,928	$ 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	$ 310,928	$ 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	$ 388,660	$ 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	$ 733,197	$ 686,375
Common equity Tier 1, actual ratio	0.0973	0.0929
Common equity Tier 1 for capital adequacy purposes, amount	$ 339,013	$ 332,512
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	$ 527,353	$ 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	$ 489,685	$ 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	$ 288,709	$ 275,337
Total risk-based capital, actual, ratio	0.1295	0.1307
Total risk-based capital for capital adequacy purposes, amount	$ 178,291	$ 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	$ 234,007	$ 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	$ 222,864	$ 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	$ 260,833	$ 248,978
Tier 1 risk-based capital, actual, ratio	0.1170	0.1181
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 133,718	$ 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	$ 189,434	$ 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	$ 178,291	$ 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	$ 260,833	$ 248,978
Tier 1 leverage, actual, ratio	0.1104	0.1101
Tier 1 leverage for capital adequacy purposes, amount	$ 94,465	$ 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	$ 94,465	$ 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	$ 118,081	$ 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	$ 260,833	$ 248,978
Common equity Tier 1, actual ratio	0.1170	0.1181
Common equity Tier 1 for capital adequacy purposes, amount	$ 100,289	$ 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	$ 156,005	$ 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	$ 144,861	$ 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	$ 343,875	$ 308,153
Total risk-based capital, actual, ratio	0.1668	0.1484
Total risk-based capital for capital adequacy purposes, amount	$ 164,959	$ 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	$ 216,509	$ 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	$ 206,199	$ 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	$ 318,177	$ 282,258
Tier 1 risk-based capital, actual, ratio	0.1543	0.1359
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 123,720	$ 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	$ 175,269	$ 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	$ 164,959	$ 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	$ 318,177	$ 282,258
Tier 1 leverage, actual, ratio	0.1458	0.1317
Tier 1 leverage for capital adequacy purposes, amount	$ 87,303	$ 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	$ 87,303	$ 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	$ 109,128	$ 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	$ 318,177	$ 282,258
Common equity Tier 1, actual ratio	0.1543	0.1359
Common equity Tier 1 for capital adequacy purposes, amount	$ 92,790	$ 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	$ 144,340	$ 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	$ 134,030	$ 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	$ 152,195	$ 142,974
Total risk-based capital, actual, ratio	0.1258	0.1204
Total risk-based capital for capital adequacy purposes, amount	$ 96,820	$ 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	$ 127,076	$ 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	$ 121,025	$ 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	$ 137,739	$ 128,130
Tier 1 risk-based capital, actual, ratio	0.1138	0.1079
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 72,615	$ 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	$ 102,871	$ 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	$ 96,820	$ 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	$ 137,739	$ 128,130
Tier 1 leverage, actual, ratio	0.1079	0.1009
Tier 1 leverage for capital adequacy purposes, amount	$ 51,052	$ 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	$ 51,052	$ 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	$ 63,815	$ 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	$ 137,739	$ 128,130
Common equity Tier 1, actual ratio	0.1138	0.1079
Common equity Tier 1 for capital adequacy purposes, amount	$ 54,461	$ 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	$ 84,717	$ 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	$ 78,666	$ 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	$ 251,030	$ 243,106
Total risk-based capital, actual, ratio	0.1258	0.1224
Total risk-based capital for capital adequacy purposes, amount	$ 159,629	$ 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	$ 209,513	$ 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	$ 199,536	$ 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	$ 228,770	$ 218,647
Tier 1 risk-based capital, actual, ratio	0.1147	0.1101
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 119,721	$ 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	$ 169,605	$ 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	$ 159,629	$ 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	$ 228,770	$ 218,647
Tier 1 leverage, actual, ratio	0.1126	0.1090
Tier 1 leverage for capital adequacy purposes, amount	$ 81,302	$ 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	$ 81,302	$ 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	$ 101,627	$ 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	$ 228,770	$ 218,647
Common equity Tier 1, actual ratio	0.1147	0.1101
Common equity Tier 1 for capital adequacy purposes, amount	$ 89,791	$ 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	$ 139,675	$ 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	$ 129,698	$ 129,109
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%