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Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
operatingSegment
bankDivision
reporting_unit
quarter
component
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Property, Plant and Equipment      
Number of bank divisions | bankDivision 17    
Number of operating segments | operatingSegment 1    
Maximum period of original maturity to be included in cash and cash equivalents 3 months    
Federal reserve balance or cash on hand required $ 0    
Minimum period past due to consider loans as delinquent 30 days    
Minimum period past due to consider loans as non accrual 90 days    
Financing receivable, allowance for credit losses, forecasting period | quarter 4    
Financing receivable, allowance for credit losses, number of components | component 2    
Provision for credit losses on debt securities $ 0 $ 0 $ 0
Maximum term leases will be considered short-term 12 months    
Maximum period up to which purchase price of business is allocated to assets acquired and liabilities assumed 1 year    
Number of reporting units subsequent to aggregation for goodwill assessment | reporting_unit 1    
Revenue from contracts with customers $ 65,194,000 54,520,000 $ 69,877,000
Impairment losses on receivables related to contracts with customers $ 0 $ 0  
Percentage of likelihood for term more likely than not as it relates to income taxes 50.00%    
Minimum Range      
Property, Plant and Equipment      
Period past due to consider loan as purchased credit-deteriorated loan 90 days    
Minimum number of days delinquent to charge off loans 120 days    
Number of years for home equity loan origination term 10 years    
Period past due to consider loans as delinquent 30 days    
Period past due to consider loans as non accrual 90 days    
Minimum Range | Office Buildings      
Property, Plant and Equipment      
Useful life of premises and equipment 15 years    
Minimum Range | Furniture, Fixtures and Equipment      
Property, Plant and Equipment      
Useful life of premises and equipment 3 years    
Maximum Range      
Property, Plant and Equipment      
Number of years for home equity loan origination term 15 years    
Period past due to consider loans as delinquent 89 days    
Maximum Range | Office Buildings      
Property, Plant and Equipment      
Useful life of premises and equipment 40 years    
Maximum Range | Furniture, Fixtures and Equipment      
Property, Plant and Equipment      
Useful life of premises and equipment 10 years