SECURITIES - Amortized Cost and Fair Value By Contractual Maturity, Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Held-to-maturity, Amortized Cost
One to five years	$ 19,795
Five to ten years	78,871
Pass-through MBS issued by GSEs and agency CMO	490,665
Total Amortized Cost	589,331
Held-to-maturity, Fair Value
One to five years	18,292
Five to ten years	66,953
Pass-through MBS issued by GSEs and agency CMO	419,473
Total Fair Value	$ 504,718	$ 516,930

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 in sixth through tenth rolling fiscal year following current statement of financial position date. For interim and annual periods when interim period is reported on rolling approach.

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