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OTHER COMPREHENSIVE INCOME - AOCI Changes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Summary of the AOCI balances, net of tax        
Balance at beginning of period $ 955,423 $ 886,971 $ 912,756 $ 856,613
Current year change 4,560 767 6,175 1,378
Balance at end of period 979,705 893,400 979,705 893,400
Accumulated Other Comprehensive Income (Loss)        
Summary of the AOCI balances, net of tax        
Balance at beginning of period (18,793) (31,368) (20,408) (31,979)
Current year change     6,175 1,378
Balance at end of period (14,233) (30,601) (14,233) (30,601)
Unrealized gain (loss) on AFS debt securities        
Summary of the AOCI balances, net of tax        
Balance at beginning of period     (20,408) (31,979)
Current year change     9,145 1,378
Balance at end of period (11,263) $ (30,601) (11,263) $ (30,601)
Unrealized gain (loss) on derivatives        
Summary of the AOCI balances, net of tax        
Current year change     (2,970)  
Balance at end of period $ (2,970)   $ (2,970)