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Acquisitions - Limestone Bancorp, Inc. - Narrative (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Apr. 30, 2023
USD ($)
branch
shares
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Business Acquisition [Line Items]          
Other non-interest expense   $ 4,342 $ 9,820 $ 16,510 $ 19,859
Data processing and software expense   6,111 6,288 18,623 15,578
Salaries and employee benefit costs   37,085 36,608 112,542 106,661
Professional fees   2,896 3,456 8,798 13,775
Limestone Bancorp, Inc.          
Business Acquisition [Line Items]          
Number of branches operated | branch 20        
Common shares paid (in shares) | shares 0.90        
Equity interest issued $ 177,900        
Acquisition related cost   $ (700) 4,400 $ (700) 15,700
Other non-interest expense     2,100   3,000
Data processing and software expense     1,300   1,300
Salaries and employee benefit costs     600   5,700
Professional fees     $ 400   5,500
Other non-interest expense miscellaneous         $ 200
Limestone Bancorp, Inc. | Common Shares          
Business Acquisition [Line Items]          
Issuance of common shares related to the merger with Limestone Bancorp, Inc. (in shares) | shares 6,827,668