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Borrowings (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 30, 2021
Jun. 30, 2023
Mar. 15, 2023
Dec. 31, 2022
Short-Term Debt [Line Items]        
Short-term borrowings   $ 51,703   $ 41,954
Debt Instrument [Line Items]        
Long-term debt outstanding   $ 81,000   21,000
Interest rate percentage   5.63%    
Amount eligible to borrow from FHLB   $ 813,925    
Amount available to borrow from FHLB   $ 728,692    
Weighted average rate percentage   4.40%    
FHLB Advances        
Debt Instrument [Line Items]        
Long-term debt outstanding   $ 60,000   0
Subordinated debt        
Debt Instrument [Line Items]        
Long-term debt outstanding   15,000   15,000
Interest rate percentage 4.00%      
Subordinated debt issued $ 15,000      
Debt Instrument, issuance price, percentage 100.00%      
Subordinated debt | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate        
Debt Instrument [Line Items]        
Basis spread on prime rate, percentage 3.29%      
Securities sold under agreements to repurchase        
Short-Term Debt [Line Items]        
Short-term borrowings   26,703   41,954
FHLB Advances        
Short-Term Debt [Line Items]        
Short-term borrowings   25,000   0
Trust preferred subordinated debt, FCBI | Subordinated debt        
Debt Instrument [Line Items]        
Long-term debt outstanding   6,000   $ 6,000
Subordinated debt issued   $ 6,000    
Trust preferred subordinated debt, FCBI | Subordinated debt | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Interest rate percentage     7.18%  
Basis spread on prime rate, percentage   1.63%