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INVESTMENT SECURITIES - Allowance for credit losses of held to maturity securities by major security type (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]    
BEGINNING BALANCE $ 37,000  
PROVISION (RECOVERY) 52,000 $ (77,000)
ENDING BALANCE 89,000 37,000
Cumulative effect adjustment for adoption of ASC 326    
Schedule of Held-to-Maturity Securities [Line Items]    
BEGINNING BALANCE   114,000
Municipal    
Schedule of Held-to-Maturity Securities [Line Items]    
BEGINNING BALANCE 2,000  
PROVISION (RECOVERY)   (1,000)
ENDING BALANCE 2,000 2,000
Municipal | Cumulative effect adjustment for adoption of ASC 326    
Schedule of Held-to-Maturity Securities [Line Items]    
BEGINNING BALANCE   3,000
Corporate bonds and other securities    
Schedule of Held-to-Maturity Securities [Line Items]    
BEGINNING BALANCE 35,000  
PROVISION (RECOVERY) 52,000 (76,000)
ENDING BALANCE $ 87,000 35,000
Corporate bonds and other securities | Cumulative effect adjustment for adoption of ASC 326    
Schedule of Held-to-Maturity Securities [Line Items]    
BEGINNING BALANCE   $ 111,000