Note 9 - BUSINESS SEGMENT INFORMATION - Selected Financial Information on the Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Total revenue	$ 152,577			$ 135,161			$ 445,119	$ 386,117
Net interest income	59,722			55,255			170,584	165,270
Provision for credit losses	3,484			3,806			11,949	11,340
Net Income (Loss)	27,785	$ 29,114	$ 26,726	25,121	$ 28,425	$ 27,157	83,625	80,703
Goodwill	138,595			139,027			138,595	139,027	$ 139,027
Intangibles	11,751			14,537			11,751	14,537	13,821
Total assets	9,088,565			8,540,057			9,088,565	8,540,057	$ 8,538,894
Intersegment Eliminations
Total revenue	(35,518)			(32,197)			(107,868)	(103,606)
Net interest income	389			284			1,103	938
Net Income (Loss)	(34,469)			(31,092)			(104,206)	(99,658)
Total assets	(1,274,943)			(1,141,314)			(1,274,943)	(1,141,314)
Commercial Banking | QCBT | Operating Segments
Total revenue	43,685			38,165			125,933	106,664
Net interest income	18,775			17,198			53,463	50,590
Provision for credit losses	2,537			2,686			8,990	7,879
Net Income (Loss)	4,911			5,856			15,371	17,710
Goodwill	2,791			3,223			2,791	3,223
Total assets	2,552,962			2,433,084			2,552,962	2,433,084
Commercial Banking | CRBT | Operating Segments
Total revenue	48,327			43,592			146,469	138,018
Net interest income	18,456			16,852			52,464	50,254
Provision for credit losses	1,696			503			3,490	2,499
Net Income (Loss)	15,946			13,175			51,725	48,928
Goodwill	14,980			14,980			14,980	14,980
Intangibles	692			950			692	950
Total assets	2,625,943			2,442,263			2,625,943	2,442,263
Commercial Banking | CSB | Operating Segments
Total revenue	22,470			19,225			64,459	53,126
Net interest income	11,745			11,136			34,104	32,683
Provision for credit losses	(186)			275			47	965
Net Income (Loss)	5,527			4,740			14,603	14,113
Goodwill	9,888			9,888			9,888	9,888
Intangibles	1,006			1,579			1,006	1,579
Total assets	1,519,585			1,417,249			1,519,585	1,417,249
Commercial Banking | Guaranty Bank | Operating Segments
Total revenue	38,120			34,498			109,669	90,443
Net interest income	14,589			13,743			41,965	42,716
Provision for credit losses	(563)			342			(578)	(3)
Net Income (Loss)	7,531			6,801			20,803	17,344
Goodwill	110,936			110,936			110,936	110,936
Intangibles	10,053			12,008			10,053	12,008
Total assets	2,360,301			2,242,638			2,360,301	2,242,638
Other Segments | Operating Segments
Total revenue	35,493			31,878			106,457	101,472
Net interest income	(4,232)			(3,958)			(12,515)	(11,911)
Net Income (Loss)	28,339			25,641			85,329	82,266
Total assets	$ 1,304,717			$ 1,146,137			$ 1,304,717	$ 1,146,137