SECURITIES (Securities held to maturity debt maturities) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in 1 year or less	$ 8,147
Due in 1 to 5 years	91,287
Due in 5 to 10 years	207,209
Due after 10 years	534,412
Total debt securities	841,055	$ 838,241
Estimated Fair Value
Due in 1 year or less	8,149
Due in 1 to 5 years	90,939
Due in 5 to 10 years	204,220
Due after 10 years	510,444
Estimated Fair Value	$ 813,752	$ 816,399

Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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