NOTE 7 - BUSINESS SEGMENT INFORMATION - Selected Financial Information on the Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Total revenue	$ 77,276		$ 71,246		$ 141,454	$ 135,341
Net interest income	40,948		38,013		78,646	74,921
Provision for loan/lease losses	19,915		1,941		28,282	4,075
Net income (loss)	13,739	$ 11,228	13,504	$ 12,918	24,967	26,422
Goodwill	74,248		77,748		74,248	77,748	$ 74,748
Intangibles	13,872		16,089		13,872	16,089	14,970
Total assets	5,604,761		5,194,852		5,604,761	5,194,852	$ 4,909,050
Intersegment Eliminations [Member]
Total revenue	(17,788)		(17,870)		(33,502)	(32,528)
Net interest income	245				477
Net income (loss)	(17,421)		(17,167)		(32,674)	(31,617)
Total assets	(765,385)		(613,033)		(765,385)	(613,033)
Commercial Banking | QCBT | Operating Segments [Member]
Total revenue	19,727		20,374		39,227	38,918
Net interest income	15,653		12,632		30,080	24,771
Provision for loan/lease losses	7,539		973		10,722	1,993
Net income (loss)	3,307		4,505		8,210	8,690
Goodwill	3,223		3,223		3,223	3,223
Total assets	1,984,245		1,637,115		1,984,245	1,637,115
Commercial Banking | CRBT | Operating Segments [Member]
Total revenue	34,612		23,575		56,607	42,819
Net interest income	12,820		10,785		24,206	21,193
Provision for loan/lease losses	7,160		300		9,410	725
Net income (loss)	10,580		6,928		16,957	12,028
Goodwill	14,980		14,980		14,980	14,980
Intangibles	2,437		2,935		2,437	2,935
Total assets	2,021,043		1,527,521		2,021,043	1,527,521
Commercial Banking | CSB | Operating Segments [Member]
Total revenue	9,752		9,730		19,802	19,000
Net interest income	7,538		7,294		15,038	14,260
Provision for loan/lease losses	2,811		151		4,775	301
Net income (loss)	591		2,207		1,629	4,363
Goodwill	9,888		9,888		9,888	9,888
Intangibles	3,643		4,328		3,643	4,328
Total assets	903,648		806,704		903,648	806,704
Commercial Banking | SFC Bank | Operating Segments [Member]
Total revenue	9,533		7,757		18,224	15,045
Net interest income	6,201		5,425		11,843	10,651
Provision for loan/lease losses	2,405		485		3,375	985
Net income (loss)	1,899		2,079		4,105	3,732
Goodwill	45,975		45,975		45,975	45,975
Intangibles	6,344		7,268		6,344	7,268
Total assets	745,470		671,644		745,470	671,644
Wealth Management Segment [Member] | Operating Segments [Member]
Total revenue	3,627		4,249		7,665	8,478
Net income (loss)	986		583		1,806	1,741
Other Segments | Operating Segments [Member]
Total revenue	17,813		23,431		33,431	43,609
Net interest income	(1,509)		1,877		(2,998)	4,046
Provision for loan/lease losses			32			71
Net income (loss)	13,797		14,369		24,934	27,485
Goodwill	182		3,682		182	3,682
Intangibles	1,448		1,558		1,448	1,558
Total assets	$ 715,740		$ 1,164,901		$ 715,740	$ 1,164,901