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OTHER COMPREHENSIVE INCOME (LOSS) - Changes in the Accumulated Balances (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Changes in the accumulated balances for each component of other comprehensive income      
Balance at beginning of period $ 173,334 $ 167,088 $ 167,088
Current year-to-date other comprehensive income (loss) (702) 1,065  
Balance at end of period 172,821 164,561 173,334
Unrealized Gains (Losses) on AFS Securities      
Changes in the accumulated balances for each component of other comprehensive income      
Balance at beginning of period (24,001) (24,353) (24,353)
Current year-to-date other comprehensive income (loss) (891)   352
Balance at end of period (24,892)   (24,001)
Other Accumulated Comprehensive Income (Loss), net of tax      
Changes in the accumulated balances for each component of other comprehensive income      
Balance at beginning of period (17,328) (17,656) (17,656)
Current year-to-date other comprehensive income (loss) (702)   328
Balance at end of period $ (18,030) $ (16,591) $ (17,328)