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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Mar. 31, 2022
Finite Lived Intangible Assets [Line Items]          
Goodwill, net $ 196,461     $ 140,412  
Principal balance of mortgage loans serviced for others $ 641,200     $ 73,600  
Weighted average amortization period of intangibles 3 years 9 months 10 days        
Core Deposit Intangibles          
Finite Lived Intangible Assets [Line Items]          
Weighted average amortization period of intangibles 3 years 6 months 3 days        
Customer List Intangibles          
Finite Lived Intangible Assets [Line Items]          
Weighted average amortization period of intangibles 4 years 6 months 21 days        
Blackhawk Bancorp, Inc          
Finite Lived Intangible Assets [Line Items]          
Goodwill, net $ 50,097 $ 50,100      
Purdum, Gray, Ingledue, Beck, Inc.          
Finite Lived Intangible Assets [Line Items]          
Goodwill, net 5,951   $ 6,000    
Delta Bancshares Company          
Finite Lived Intangible Assets [Line Items]          
Goodwill, net $ 28,558       $ 28,600