Note 6 - Goodwill and Intangibles - Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Goodwill	$ 137,607	$ 74,066	$ 74,066	$ 74,748
Commercial Banking | QCBT
Segment Reporting Information [Line Items]
Goodwill	3,223	3,223	3,223
Commercial Banking | CRBT
Segment Reporting Information [Line Items]
Goodwill	14,980	14,980	14,980
Commercial Banking | CSB
Segment Reporting Information [Line Items]
Goodwill	9,888	9,888	9,888
Commercial Banking | SFCB.
Segment Reporting Information [Line Items]
Goodwill	$ 109,516	$ 45,975	$ 45,975