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Note 7 - Goodwill and Intangibles - Goodwill by Reportable Segment (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]        
Goodwill $ 139,027 $ 137,607 $ 74,066 $ 74,066
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 | GB        
Segment Reporting Information [Line Items]        
Goodwill $ 110,936 $ 109,516 $ 45,975