Note 8 - BUSINESS SEGMENT INFORMATION - Selected Financial Information on the Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Total revenue	$ 130,897		$ 90,987		$ 250,956	$ 157,682
Net interest income	53,205		59,400		110,015	105,133
Provision for credit losses	3,606		11,200		7,534	8,284
Net income (loss) from continuing operations	28,425	$ 27,157	15,242	$ 23,624	55,582	38,866
Goodwill	139,027		137,607		139,027	137,607	$ 137,607
Intangibles	15,228		18,333		15,228	18,333	16,759
Total assets	8,226,673		7,392,941		8,226,673	7,392,941	$ 7,948,837
Intersegment Eliminations [Member]
Total revenue	(36,363)		(27,005)		(71,409)	(56,073)
Net interest income	310		345		654	691
Net income (loss) from continuing operations	(34,458)		(26,452)		(68,566)	(54,984)
Total assets	(1,431,275)		(923,834)		(1,431,275)	(923,834)
Commercial Banking | QCBT | Operating Segments [Member]
Total revenue	35,375		23,722		68,499	46,202
Net interest income	16,403		18,540		33,391	35,854
Provision for credit losses	3,620		617		5,193	(642)
Net income (loss) from continuing operations	4,816		8,425		11,854	18,395
Goodwill	3,223		3,223		3,223	3,223
Total assets	2,611,832		2,122,852		2,611,832	2,122,852
Commercial Banking | CRBT | Operating Segments [Member]
Total revenue	51,303		31,715		94,426	56,926
Net interest income	16,223		15,093		33,402	29,416
Provision for credit losses	480		(165)		1,996	(936)
Net income (loss) from continuing operations	19,353		13,256		35,753	24,385
Goodwill	14,980		14,980		14,980	14,980
Intangibles	991		1,463		991	1,463
Total assets	2,389,623		1,985,198		2,389,623	1,985,198
Commercial Banking | CSB | Operating Segments [Member]
Total revenue	17,333		12,091		33,901	23,407
Net interest income	10,657		9,851		21,547	19,182
Provision for credit losses	198		100		690	(285)
Net income (loss) from continuing operations	4,613		3,374		9,373	7,500
Goodwill	9,888		9,888		9,888	9,888
Intangibles	1,729		2,340		1,729	2,340
Total assets	1,332,966		1,221,406		1,332,966	1,221,406
Commercial Banking | Guaranty Bank | Operating Segments [Member]
Total revenue	28,324		23,669		55,945	31,513
Net interest income	13,601		18,065		28,973	24,593
Provision for credit losses	(692)		10,648		(345)	10,147
Net income (loss) from continuing operations	5,156		1,027		10,543	4,131
Goodwill	110,936		109,516		110,936	109,516
Intangibles	12,508		14,530		12,508	14,530
Total assets	2,179,844		2,037,364		2,179,844	2,037,364
Other Segments | Operating Segments [Member]
Total revenue	34,925		26,795		69,594	55,707
Net interest income	(3,989)		(2,494)		(7,952)	(4,603)
Net income (loss) from continuing operations	28,945		15,612		56,625	39,439
Total assets	$ 1,143,683		$ 949,955		$ 1,143,683	$ 949,955