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INVESTMENT SECURITIES - Realized Gain/Loss on Investment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]        
Proceeds $ 0 $ 74,399 $ 4,693 $ 75,361
Gross gains 0 1,334 3 1,405
Gross losses $ 0 $ (1,381) $ 0 $ (1,381)