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SECURITIES (Gross realized gain (loss)) (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 from sales $ 44,457 $ 57,610 $ 331,196 $ 1,031,521
Gross security gains 803 0 1,286 7,298
Gross security losses $ 744 $ 1,070 $ 2,656 $ 9,018