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Significant Accounting Policies (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
segment
banking_center
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Accounting Policies [Abstract]      
Number of banking centers | banking_center 44    
Number of segments | segment 1    
Equity investments $ 15,700,000 $ 12,100,000  
Impairment loss   0  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
OREO 1,500,000 1,600,000  
Penalties and related interest 0 0 $ 0
Other Investments 21,400,000 15,700,000  
Investments in tax credit entities $ 11,100,000 $ 7,600,000  
Tax Credit Entity      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
General partner ownership interest 0.10%    
Buildings and improvements | Minimum      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 35 years    
Buildings and improvements | Maximum      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 39 years    
Furniture, fixtures and equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 3 years    
Furniture, fixtures and equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 7 years