Note 17 - Regulatory Capital Requirements and Restrictions on Dividends - Capital Requirements (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Total risk-based capital, actual, amount	$ 1,055,177	$ 814,629
Total risk-based capital, actual, ratio	0.1428	0.1477
Total risk-based capital for capital adequacy purposes, amount	$ 591,132	$ 441,100
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	$ 775,861	$ 578,944
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	$ 738,915	$ 551,375
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	$ 734,977	$ 631,649
Tier 1 risk-based capital, actual, ratio	0.0995	0.1146
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 443,349	$ 330,825
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	$ 628,078	$ 468,669
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	$ 591,132	$ 441,100
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 734,977	$ 631,649
Tier 1 leverage, actual, ratio	0.0961	0.1046
Tier 1 leverage for capital adequacy purposes, amount	$ 305,959	$ 241,579
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 305,959	$ 241,579
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	$ 382,449	$ 301,974
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 686,375	$ 593,494
Common equity Tier 1, actual ratio	0.0929	0.1076
Common equity Tier 1 for capital adequacy purposes, amount	$ 332,512	$ 248,119
Common equity Tier 1 for capital adequacy purposes, ratio	0.045%	0.045%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 517,241	$ 385,962
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	0.07%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 480,295	$ 358,394
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	0.065%
QCBT
Total risk-based capital, actual, amount	$ 275,337	$ 247,658
Total risk-based capital, actual, ratio	0.1307	0.1329
Total risk-based capital for capital adequacy purposes, amount	$ 168,588	$ 149,126
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	$ 221,272	$ 195,727
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	$ 210,735	$ 186,407
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	$ 248,978	$ 224,253
Tier 1 risk-based capital, actual, ratio	0.1181	0.1203
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 126,441	$ 111,844
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	$ 179,125	$ 158,446
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	$ 168,588	$ 149,126
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 248,978	$ 224,253
Tier 1 leverage, actual, ratio	0.1101	0.1045
Tier 1 leverage for capital adequacy purposes, amount	$ 90,419	$ 85,873
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 90,419	$ 85,873
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	$ 133,023	$ 107,341
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 248,978	$ 224,253
Common equity Tier 1, actual ratio	0.1181	0.1203
Common equity Tier 1 for capital adequacy purposes, amount	$ 94,831	$ 83,883
Common equity Tier 1 for capital adequacy purposes, ratio	0.045%	0.045%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 147,514	$ 130,485
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	0.07%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 136,978	$ 121,164
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	0.065%
CRBT
Total risk-based capital, actual, amount	$ 308,153	$ 277,673
Total risk-based capital, actual, ratio	0.1484	0.1485
Total risk-based capital for capital adequacy purposes, amount	$ 166,168	$ 149,595
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	$ 218,096	$ 196,343
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	$ 207,711	$ 186,993
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	$ 282,258	$ 254,279
Tier 1 risk-based capital, actual, ratio	0.1359	0.1360
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 124,626	$ 112,196
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	$ 176,554	$ 158,944
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	$ 166,168	$ 149,595
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 282,258	$ 254,279
Tier 1 leverage, actual, ratio	0.1317	0.1259
Tier 1 leverage for capital adequacy purposes, amount	$ 85,707	$ 80,777
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 85,707	$ 80,777
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	$ 107,134	$ 100,971
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 282,258	$ 254,279
Common equity Tier 1, actual ratio	0.1359	0.1360
Common equity Tier 1 for capital adequacy purposes, amount	$ 93,470	$ 84,147
Common equity Tier 1 for capital adequacy purposes, ratio	0.045%	0.045%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 145,397	$ 130,895
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	0.07%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 135,012	$ 121,546
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	0.065%
CSB
Total risk-based capital, actual, amount	$ 142,974	$ 123,365
Total risk-based capital, actual, ratio	0.1204	0.1195
Total risk-based capital for capital adequacy purposes, amount	$ 94,981	$ 82,601
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	$ 124,662	$ 108,413
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	$ 118,726	$ 103,251
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	$ 128,130	$ 110,410
Tier 1 risk-based capital, actual, ratio	0.1079	0.1069
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 71,236	$ 61,951
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	$ 100,917	$ 87,763
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	$ 94,981	$ 82,601
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800	0.0800
Tier 1 leverage, actual, amount	$ 128,130	$ 110,410
Tier 1 leverage, actual, ratio	0.1009	0.0967
Tier 1 leverage for capital adequacy purposes, amount	$ 50,799	$ 45,676
Tier 1 leverage for capital adequacy purposes, ratio	0.0400	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 50,799	$ 45,676
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	$ 63,499	$ 57,095
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500	0.0500
Common equity Tier 1, actual, amount	$ 128,130	$ 110,410
Common equity Tier 1, actual ratio	0.1079	0.1069
Common equity Tier 1 for capital adequacy purposes, amount	$ 53,427	$ 46,463
Common equity Tier 1 for capital adequacy purposes, ratio	0.045%	0.045%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 83,108	$ 72,276
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%	0.07%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 77,172	$ 67,113
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	6.50%	0.065%
SFCB
Total risk-based capital, actual, amount		$ 101,067
Total risk-based capital, actual, ratio		0.1339
Total risk-based capital for capital adequacy purposes, amount		$ 60,369
Total risk-based capital for capital adequacy purposes, ratio		0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount		$ 79,235
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio		0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 75,462
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio		0.1000
Tier 1 risk-based capital, actual, amount		$ 91,625
Tier 1 risk-based capital, actual, ratio		0.1214
Tier 1 risk-based capital for capital adequacy purposes, amount		$ 45,277
Tier 1 risk-based capital for capital adequacy purposes, ratio		0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount		$ 64,142
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio		0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount		$ 60,369
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio		0.0800
Tier 1 leverage, actual, amount		$ 91,625
Tier 1 leverage, actual, ratio		0.1108
Tier 1 leverage for capital adequacy purposes, amount		$ 33,088
Tier 1 leverage for capital adequacy purposes, ratio		0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount		$ 33,088
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio		0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount		$ 41,360
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio		0.0500
Common equity Tier 1, actual, amount		$ 91,625
Common equity Tier 1, actual ratio		0.1214
Common equity Tier 1 for capital adequacy purposes, amount		$ 33,958
Common equity Tier 1 for capital adequacy purposes, ratio		0.045%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount		$ 52,823
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio		0.07%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount		$ 49,050
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio		0.065%
Guaranty Bank
Total risk-based capital, actual, amount	$ 243,106
Total risk-based capital, actual, ratio	0.1224
Total risk-based capital for capital adequacy purposes, amount	$ 158,903
Total risk-based capital for capital adequacy purposes, ratio	0.0800
Total risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 208,560
Total risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.1050
Total risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 198,629
Total risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.1000
Tier 1 risk-based capital, actual, amount	$ 218,647
Tier 1 risk-based capital, actual, ratio	0.1101
Tier 1 risk-based capital for capital adequacy purposes, amount	$ 119,177
Tier 1 risk-based capital for capital adequacy purposes, ratio	0.0600
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, amount	$ 168,834
Tier 1 risk-based capital for capital adequacy purposes with capital conservation buffer, ratio	0.0850
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, amount	$ 158,903
Tier 1 risk-based capital to be well capitalized under prompt corrective action provisions, ratio	0.0800
Tier 1 leverage, actual, amount	$ 218,647
Tier 1 leverage, actual, ratio	0.1090
Tier 1 leverage for capital adequacy purposes, amount	$ 80,229
Tier 1 leverage for capital adequacy purposes, ratio	0.0400
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, amount	$ 80,229
Tier 1 leverage for capital adequacy purposes with capital conservation buffer, ratio	0.0400
Tier 1 leverage to be well capitalized under prompt corrective action provisions, amount	$ 100,286
Tier 1 leverage to be well capitalized under prompt corrective action provisions, ratio	0.0500
Common equity Tier 1, actual, amount	$ 218,647
Common equity Tier 1, actual ratio	0.1101
Common equity Tier 1 for capital adequacy purposes, amount	$ 89,383
Common equity Tier 1 for capital adequacy purposes, ratio	0.045%
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, amount	$ 139,040
Common equity Tier 1 for capital adequacy purposes with capital conservation buffer, ratio	7.00%
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, amount	$ 129,109
Common equity Tier 1 to be well capitalized under prompt corrective action provisions, ratio	0.065%