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Borrowings (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jul. 14, 2021
Sep. 30, 2021
Dec. 31, 2020
Borrowings and FHLB Advances [Abstract]      
Available federal funds lines   $ 115,000 $ 100,000
Available credit with FHLB   380,300 374,700
Short-Term Borrowings [Abstract]      
Overnight repurchase agreements   4,496 6,619
Total short-term borrowings   4,496 6,619
Maximum month-end outstanding balance   12,239 9,080
Average outstanding balance during the period   $ 8,116 $ 21,092
Average interest rate (year-to-date)   0.10% 0.19%
Average interest rate at end of period   0.10% 0.10%
Long-Term Borrowings [Abstract]      
Federal Reserve Bank Borrowings   $ 898 $ 28,550
Minimum [Member]      
Borrowings and FHLB Advances [Abstract]      
Overnight repurchase agreements maturity period   1 day  
Maximum [Member]      
Borrowings and FHLB Advances [Abstract]      
Overnight repurchase agreements maturity period   4 days  
Paycheck Protection Program Liquidity Facility [Member]      
Long-Term Borrowings [Abstract]      
Federal Reserve Bank Borrowings   $ 898  
New advances   $ 0  
Paycheck Protection Program Liquidity Facility [Member] | Maximum [Member]      
Long-Term Borrowings [Abstract]      
Maturity term of borrowings from origination   24 months  
Citizens Acquisition [Member]      
Long-Term Borrowings [Abstract]      
Loan maturity date   Apr. 01, 2023  
Loans outstanding     $ 1,400
Interest rate     2.61%
Long term borrowings, net of issuance costs     $ 1,400
The Notes [Member] | Subordinated Notes [Member]      
Long-Term Borrowings [Abstract]      
Loan maturity date Dec. 31, 2031    
Loans outstanding $ 29,400    
Interest rate 3.50%    
Long term borrowings, net of issuance costs $ 29,400    
Principal amount $ 30,000    
Fixed interest rate, period 5 years    
The Notes [Member] | Subordinated Notes [Member] | SOFR [Member]      
Long-Term Borrowings [Abstract]      
Term of variable rate 3 months    
Debt instrument, variable rate 2.86%