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Business Combinations - Additional Information (Details)
3 Months Ended 9 Months Ended
Jul. 17, 2020
USD ($)
lease
$ / shares
shares
Sep. 30, 2021
USD ($)
category
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
category
Sep. 30, 2020
USD ($)
Business Acquisition [Line Items]          
Acquisition related costs   $ 0 $ 3,400,000 $ 0 $ 3,900,000
Number of loan portfolio segments | category   2   2  
Bank of Akron          
Business Acquisition [Line Items]          
Share price (in dollars per share) | $ / shares $ 215.00        
Share conversion ratio 6.6729        
Percentage of shares exchanged 75.00%        
Total merger consideration $ 40,793,000        
Value of cash consideration for Akron common stock exchanged for cash $ 16,126,000        
Equity interest issued (in shares) | shares 1,501,321        
Value of stock consideration assigned to Akron common shares exchanged for stock paid to shareholders $ 24,667,000        
Equity interest issued, value assigned (in USD per share) | $ / shares $ 16.43        
Core deposit intangible $ 613,000        
Fair value interest rate premium $ 5,000,000        
Goodwill adjustments       $ 0  
Number of lease agreements | lease 1        
Bank of Akron | Core Deposits          
Business Acquisition [Line Items]          
Core deposit intangible $ 613,000