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Summary of Significant Accounting Policies - Additional Information (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Machine
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
Dec. 31, 2016
Summary Of Significant Accounting Policies [Line Items]          
Lessee, operating lease, existence of option to extend true        
Number of automated teller machine under lease | Machine 1        
Impairment of goodwill recognized $ 0 $ 0 $ 0    
Defined contribution plan, employer matching contribution, percent         10.00%
Defined benefit pension highest consecutive plan period         3 years
Compensation cost $ 0        
Profit Sharing Plan          
Summary Of Significant Accounting Policies [Line Items]          
Defined contribution plan, maximum employee contribution, percent       100.00%  
Defined contribution plan, employer matching contribution, percent       4.00%  
Normal retirement age of employees       65 years  
Commercial Mortgage          
Summary Of Significant Accounting Policies [Line Items]          
Percentage of loan to value ratio 75.00%        
Minimum | Residential Mortgage and Home Equity Loans          
Summary Of Significant Accounting Policies [Line Items]          
Percentage of loan to value ratio 80.00%        
Maximum          
Summary Of Significant Accounting Policies [Line Items]          
Percentage of bank-owned life insurance 25.00%        
Maximum | Residential Mortgage and Home Equity Loans          
Summary Of Significant Accounting Policies [Line Items]          
Percentage of loan to value ratio 97.00%