Note 22 - Business Segment Information - Selected Financial Information on the Company's Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total revenue	$ 300,577	$ 312,171	$ 294,844
Net interest income	178,233	166,950	155,559
Provision for credit losses	3,486	55,704	7,066
Net income (loss) from continuing operations	98,905	60,582	57,408
Goodwill	74,066	74,066	74,748	$ 77,832
Intangibles	9,349	11,381	14,970
Total assets	6,096,132	5,705,043	4,909,050
Intersegment Eliminations [Member]
Total revenue	(118,930)	(262)	(1,606)
Net interest income	1,263	1,031
Net income (loss) from continuing operations	(117,834)
Total assets	(973,102)	(324,971)	(65,305)
Commercial Banking | QCBT
Goodwill	3,223	3,223	3,223
Commercial Banking | QCBT | Operating Segments [Member]
Total revenue	88,689	92,336	87,433
Net interest income	66,232	63,366	52,097
Provision for credit losses	1,519	21,612	3,433
Net income (loss) from continuing operations	34,616	21,557	21,607
Goodwill	3,223	3,223	3,223
Total assets	2,142,344	2,153,773	1,682,477
Commercial Banking | CRBT
Goodwill	14,980	14,980	14,980
Commercial Banking | CRBT | Operating Segments [Member]
Total revenue	129,080	125,416	96,631
Net interest income	57,354	52,857	44,310
Provision for credit losses	(697)	19,438	1,080
Net income (loss) from continuing operations	55,411	33,890	27,716
Goodwill	14,980	14,980	14,980
Intangibles	1,702	2,189	2,684
Total assets	2,030,279	1,957,695	1,572,324
Commercial Banking | CSB
Goodwill	9,888	9,888	9,888
Commercial Banking | CSB | Operating Segments [Member]
Total revenue	43,945	50,448	42,059
Net interest income	35,512	31,570	31,370
Provision for credit losses	2,219	9,243	679
Net income (loss) from continuing operations	12,802	11,379	10,787
Goodwill	9,888	9,888	9,888
Intangibles	2,653	3,305	3,980
Total assets	1,168,606	1,004,183	853,833
Commercial Banking | SFCB
Goodwill	45,975	45,975	45,975
Commercial Banking | SFCB | Operating Segments [Member]
Total revenue	38,342	42,036	31,569
Net interest income	26,351	24,759	21,422
Provision for credit losses	445	5,411	1,315
Net income (loss) from continuing operations	14,579	12,797	8,244
Goodwill	45,975	45,975	45,975
Intangibles	4,994	5,887	6,802
Total assets	882,885	779,956	748,753
Other Segments | Operating Segments [Member]
Total revenue	119,451	2,197	38,758
Net interest income	(8,479)	(6,633)	6,360
Provision for credit losses			559
Net income (loss) from continuing operations	99,331	(19,041)	(10,946)
Goodwill			682
Intangibles			1,504
Total assets	$ 845,120	$ 134,407	$ 116,968