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Business Combinations, Goodwill and Intangible Assets - Narrative (Details)
 12 Months Ended
Jan. 01, 2022
USD ($)
bankingOffice
$ / shares
shares
Dec. 31, 2024
USD ($)
bankingOffice
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Business Acquisition [Line Items]          
Number of banking offices | bankingOffice   74      
Total Assets   $ 6,295,910,000 $ 6,152,198,000 $ 6,155,991,000  
Loans   4,133,267,000 3,977,900,000    
Goodwill   179,025,000 180,357,000 180,357,000 $ 121,761,000
Allowance for credit losses   44,436,000 43,765,000 44,168,000 37,017,000
Decrease in goodwill attributable to sale of branches         $ 1,332,000
Goodwill impairment   0 0 0  
Amortization of expense intangible assets   2,032,000 2,840,000 $ 3,711,000  
Core Banking          
Business Acquisition [Line Items]          
Goodwill   179,025,000      
Total carrying amount of goodwill   179,025,000      
Insurance          
Business Acquisition [Line Items]          
Goodwill   1,332,000 $ 1,332,000    
Citizens Union Bancorp of Shelbyville, Inc. ("CUB")          
Business Acquisition [Line Items]          
Direct acquisition costs $ 12,323,000        
Goodwill 58,596,000        
Intangible Assets 7,572,000        
Cash paid 50,800,000        
Merger related costs   12,323,000      
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Adjustment          
Business Acquisition [Line Items]          
Allowance for credit losses   $ 6,300,000      
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Loans acquired with deteriorated credit quality          
Business Acquisition [Line Items]          
Business combination, acquired receivable, fair value 29,868,000        
Business combination, acquired receivables, gross contractual amount 34,453,000        
Estimated contractual cash flows of purchased financial asset with credit deterioration $ 3,117,000        
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Common Stock          
Business Acquisition [Line Items]          
Cash payment for each share exchanged (in dollars per share) | $ / shares $ 13.44        
Fixed exchange ratio (in shares) | shares 0.7739        
Shares of common stock issued for acquisition (in shares) | shares 2,870,975        
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Core Deposit Intangible          
Business Acquisition [Line Items]          
Intangible Assets $ 7,572,000        
Weighted average useful live of intangibles 8 years        
Citizens Union Bancorp of Shelbyville, Inc. ("CUB")          
Business Acquisition [Line Items]          
Number of banking offices | bankingOffice 15        
Citizens Union Bancorp of Shelbyville, Inc. ("CUB") | Citizens Union Bancorp of Shelbyville, Inc. ("CUB")          
Business Acquisition [Line Items]          
Total Assets $ 1,108,546,000        
Loans 683,807,000        
Deposits $ 930,533,000