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Acquisitions - Limestone Bancorp, Inc. Narrative (Details)
 3 Months Ended 6 Months Ended
Apr. 30, 2023
USD ($)
branch
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Business Acquisition [Line Items]          
Salaries and employee benefit costs   $ 36,564,000 $ 38,025,000 $ 75,457,000 $ 70,053,000
Professional fees   2,935,000 7,438,000 5,902,000 10,319,000
Other non-interest expense   7,182,000 5,465,000 12,168,000 10,039,000
Limestone Bancorp, Inc.          
Business Acquisition [Line Items]          
Number of branches operated | branch 20        
Common shares paid (in shares) | shares 0.90        
Equity interest issued $ 177,900,000        
Acquisition related cost   $ 0 10,800,000 $ (100,000) 11,200,000
Salaries and employee benefit costs     5,200,000   5,200,000
Professional fees     4,800,000   5,100,000
Insurance expense     500,000   500,000
Other non-interest expense     $ 300,000   $ 400,000
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