v3.26.1
Borrowings - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 12, 2026
Jun. 30, 2026
Jun. 11, 2026
Mar. 30, 2021
Debt Instrument [Line Items]          
Bank par value     $ 14,000    
Amount eligible to borrow from FHLB     1,300,000    
Amount available to borrow from FHLB     $ 1,010,000    
Long-term FHLB advances have a weighted average rate     4.42%    
Subordinated debt          
Debt Instrument [Line Items]          
Subordinated debt issued   $ 15,000     $ 15,000
Basis spread on prime rate, percentage   2.45%      
Interest rate percentage   5.875%     4.00%
Debt Instrument, issuance price, percentage   100.00%      
Debt Issuance Costs, Gross   $ 537      
Debt Instrument, Redemption Price, Percentage 100.00%        
Trust preferred subordinated debt, FCBI | Subordinated debt          
Debt Instrument [Line Items]          
Subordinated debt issued     $ 6,000    
Basis spread on prime rate, percentage     1.63%    
Interest rate percentage       5.56%