Note 10 - BUSINESS SEGMENT INFORMATION - Selected Financial Information on the Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Total revenue	$ 100,362			$ 86,319			$ 258,044	$ 225,572
Net interest income	60,769			46,229			165,902	131,720
Provision for credit losses							8,284	6,713
Net income (loss) from continuing operations	29,294	$ 15,242	$ 23,624	31,565	$ 22,349	$ 17,982	68,160	71,896
Goodwill	137,607			74,066			137,607	74,066	$ 74,066
Intangibles	17,546			9,857			17,546	9,857	9,349
Total assets	7,730,049			6,014,508			7,730,049	6,014,508	$ 6,096,132
Intersegment Eliminations [Member]
Total revenue	(36,311)			(36,806)			(92,383)	(86,477)
Net interest income	355			343			1,046	918
Net income (loss) from continuing operations	(35,783)			(36,442)			(90,768)	(85,888)
Total assets	(1,020,338)			(961,025)			(1,020,338)	(961,025)
Commercial Banking | QCBT | Operating Segments [Member]
Total revenue	26,583			22,630			72,785	65,590
Net interest income	18,117			16,862			53,971	48,800
Provision for credit losses	554			247			(88)	2,495
Net income (loss) from continuing operations	7,758			8,704			26,153	24,547
Goodwill	3,223			3,223			3,223	3,223
Total assets	2,218,166			2,106,631			2,218,166	2,106,631
Commercial Banking | CRBT | Operating Segments [Member]
Total revenue	34,157			41,415			91,083	98,270
Net interest income	17,160			14,784			46,576	42,395
Provision for credit losses	(35)			(733)			(971)	759
Net income (loss) from continuing operations	14,475			19,730			38,860	42,271
Goodwill	14,980			14,980			14,980	14,980
Intangibles	1,344			1,824			1,344	1,824
Total assets	2,108,614			2,019,018			2,108,614	2,019,018
Commercial Banking | CSB | Operating Segments [Member]
Total revenue	14,127			11,445			37,534	32,677
Net interest income	10,183			9,303			29,365	26,343
Provision for credit losses	(269)			596			(554)	2,718
Net income (loss) from continuing operations	4,106			3,243			11,606	8,414
Goodwill	9,888			9,888			9,888	9,888
Intangibles	2,184			2,816			2,184	2,816
Total assets	1,270,426			1,140,933			1,270,426	1,140,933
Commercial Banking | Guaranty Bank | Operating Segments [Member]
Total revenue	25,523			10,886			57,036	28,813
Net interest income	18,196			7,058			42,789	19,606
Provision for credit losses	(250)			(110)			9,897	741
Net income (loss) from continuing operations	9,196			4,590			13,327	10,544
Goodwill	109,516			45,975			109,516	45,975
Intangibles	14,018			5,217			14,018	5,217
Total assets	2,107,407			880,143			2,107,407	880,143
Other Segments | Operating Segments [Member]
Total revenue	36,283			36,749			91,989	86,699
Net interest income	(3,242)			(2,121)			(7,845)	(6,342)
Net income (loss) from continuing operations	29,542			31,740			68,982	72,008
Total assets	$ 1,045,774			$ 828,808			$ 1,045,774	$ 828,808