Note 22 - Business Segment Information - Selected Financial Information on the Company's Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Total revenue	$ 373,300	$ 300,577	$ 312,171
Net interest income	231,120	178,233	166,950
Provision for credit losses	8,284	3,486	55,704
Net income (loss) from continuing operations	99,066	98,905	60,582
Goodwill	137,607	74,066	74,066	$ 74,748
Intangibles	16,759	9,349	11,381
Total assets	7,948,837	6,096,132	5,705,043
Intersegment Eliminations [Member]
Total revenue	(132,322)	(118,930)	(262)
Net interest income	1,388	1,263	1,031
Net income (loss) from continuing operations	(130,177)	(117,834)
Total assets	(1,079,313)	(973,102)	(324,971)
Commercial Banking | QCBT
Goodwill	3,223	3,223	3,223
Commercial Banking | QCBT | Operating Segments [Member]
Total revenue	103,621	88,689	92,336
Net interest income	71,604	66,232	63,366
Provision for credit losses	1,073	1,519	21,612
Net income (loss) from continuing operations	33,850	34,616	21,557
Goodwill	3,223	3,223	3,223
Total assets	2,312,013	2,142,344	2,153,773
Commercial Banking | CRBT
Goodwill	14,980	14,980	14,980
Commercial Banking | CRBT | Operating Segments [Member]
Total revenue	128,070	129,080	125,416
Net interest income	65,392	57,354	52,857
Provision for credit losses	(961)	(697)	19,438
Net income (loss) from continuing operations	53,576	55,411	33,890
Goodwill	14,980	14,980	14,980
Intangibles	1,225	1,702	2,189
Total assets	2,185,500	2,030,279	1,957,695
Commercial Banking | CSB
Goodwill	9,888	9,888	9,888
Commercial Banking | CSB | Operating Segments [Member]
Total revenue	54,129	43,945	50,448
Net interest income	40,781	35,512	31,570
Provision for credit losses	(1,335)	2,219	9,243
Net income (loss) from continuing operations	17,225	12,802	11,379
Goodwill	9,888	9,888	9,888
Intangibles	2,027	2,653	3,305
Total assets	1,297,812	1,168,606	1,004,183
Commercial Banking | SFCB.
Goodwill	109,516	45,975	45,975
Commercial Banking | SFCB. | Operating Segments [Member]
Total revenue	87,880	38,342	42,036
Net interest income	63,734	26,351	24,759
Provision for credit losses	9,507	445	5,411
Net income (loss) from continuing operations	24,289	14,579	12,797
Goodwill	109,516	45,975	45,975
Intangibles	13,507	4,994	5,887
Total assets	2,146,474	882,885	779,956
Other Segments | Operating Segments [Member]
Total revenue	13,192,200	11,945,100	219,700
Net interest income	(1,177,900)	(847,900)	(663,300)
Net income (loss) from continuing operations	10,030,300	9,933,100	(1,904,100)
Total assets	$ 108,635,100	$ 84,512,000	$ 13,440,700