v3.25.4
SUBORDINATED DEBT AND DEBENTURES - Narrative (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 02, 2025
USD ($)
May 31, 2020
USD ($)
Dec. 31, 2025
USD ($)
qtr
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Sep. 30, 2025
USD ($)
Mar. 31, 2018
USD ($)
Subordinated Debt [Abstract]              
Subordinated debt     $ 0 $ 39,586      
Repayment of subordinated debt $ (40,000)   (40,000) 0 $ 0    
Trust preferred securities     $ 38,600 38,600      
Distribution deferral period, maximum quarters | qtr     20        
TCSB Statutory Trust I              
Subordinated Debt [Abstract]              
Interest rate spread, percent     2.46%        
Subordinated Debentures | TCSB Statutory Trust I              
Subordinated Debt [Abstract]              
Debt instrument, discount     $ 860 928     $ 1,400
Subordinated Debt              
Subordinated Debt [Abstract]              
Trust Preferred Securities Issued   $ 40,000          
Debt instrument, term   10 years          
Call option period   5 years          
Debt instrument, interest rate, stated percentage   5.95%          
Fixed coupon rate percentage, period   5 years          
Interest rate spread, percent   5.825%          
Subordinated debt     $ 0 39,590      
Debt Instrument, unamortized discount (premium) and debt issuance costs, net       $ 410   $ 360