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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Dec. 31, 2022
Apr. 30, 2023
Jan. 03, 2023
Mar. 07, 2022
Dec. 31, 2021
Goodwill [Line Items]              
Goodwill $ 355,106 $ 355,106 $ 292,397       $ 264,193
Weighted average amortization period   9 years 2 months 12 days          
Limestone Bancorp, Inc.              
Goodwill [Line Items]              
Goodwill 62,100 $ 62,100   $ 62,130      
Goodwill, adjustments $ (1,289)            
Limestone Bancorp, Inc. | Core Deposits              
Goodwill [Line Items]              
Finite-lived intangible assets acquired   $ 27,700          
Trust and Investment Business              
Goodwill [Line Items]              
Goodwill         $ 600    
Vantage Financial LLC              
Goodwill [Line Items]              
Goodwill     27,200     $ 27,164  
Percentage of equity acquired           100.00%  
Vantage Financial LLC | Indefinite-Lived Trade Names              
Goodwill [Line Items]              
Indefinite-lived intangible assets acquired     1,200        
Vantage Financial LLC | Customer Relationships              
Goodwill [Line Items]              
Finite-lived intangible assets acquired     10,800        
Vantage Financial LLC | Noncompete Agreements              
Goodwill [Line Items]              
Finite-lived intangible assets acquired     1,200        
Premier Financial Bancorp, Inc.              
Goodwill [Line Items]              
Goodwill, adjustments     1,300        
Elite Agency, Inc | Customer Relationships              
Goodwill [Line Items]              
Finite-lived intangible assets acquired     2,000        
Elite Agency, Inc | Noncompete Agreements              
Goodwill [Line Items]              
Finite-lived intangible assets acquired     $ 100