v3.22.0.1
Borrowed Funds - Additional Information (Details) - USD ($)
12 Months Ended
Nov. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Nov. 30, 2015
Jun. 15, 2006
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 76,000,000      
Line of credit, outstanding amount   0 $ 0    
Certificates of deposits, brokered, outstanding   0 45,100,000    
Line of Credit | Federal Home Loan Bank          
Debt Instrument [Line Items]          
FHLB available borrowing capacity   $ 183,300,000 201,200,000    
Line of Credit | Pledged Loans | Federal Home Loan Bank          
Debt Instrument [Line Items]          
FHLB maximum borrowing capacity, percent of assets   25.00%      
Current borrowing capacity   $ 205,300,000 222,000,000    
Line of Credit | Pledged Loans | Federal Reserve Bank Of Richmond          
Debt Instrument [Line Items]          
Current borrowing capacity   15,900,000 15,600,000    
Line of Credit | Collateral Pledged | Federal Home Loan Bank          
Debt Instrument [Line Items]          
Investments at fair value   0 1,200,000    
Certificates of Deposit | Financial Network          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 302,100,000 $ 277,100,000    
Maximum borrowing capacity, percent of assets   15.00%      
Junior subordinated debentures due June 15, 2036 | Junior Subordinated Debt          
Debt Instrument [Line Items]          
Interest rate   2.07% 2.09%    
Junior subordinated debentures due June 15, 2036 | Junior Subordinated Debt | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable rate   1.89%      
Junior subordinated debentures due June 15, 2036 | Junior Subordinated Debt | Capital Securities          
Debt Instrument [Line Items]          
Securities issued (in shares)         2,000
Face amount         $ 2,000,000
Junior subordinated debentures due June 15, 2036 | Junior Subordinated Debt | Common Securities          
Debt Instrument [Line Items]          
Face amount         $ 62,000
Other subordinated notes due November 30, 2030 | Senior Subordinated Notes          
Debt Instrument [Line Items]          
Face amount $ 10,000,000        
Interest rate 5.00% 5.00% 5.00%    
Initial fixed rate term 5 years        
Debt issuance costs $ 50,000        
Other subordinated notes due November 30, 2030 | Senior Subordinated Notes | Three Month SOFR          
Debt Instrument [Line Items]          
Basis spread on variable rate 4.90%        
Other subordinated notes due December 1, 2025 | Senior Subordinated Notes          
Debt Instrument [Line Items]          
Face amount       $ 13,500,000  
Interest rate       6.95%