SECURITIES - Amortized Cost and Fair Value By Contractual Maturity, Held-to-maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Held-to-maturity, Amortized Cost
One to five years	$ 10,000
Five to ten years	88,359
Pass-through MBS issued by GSEs and agency CMO	505,601
Total Amortized Cost	603,960
Held-to-maturity, Fair Value
One to five years	9,279
Five to ten years	74,456
Pass-through MBS issued by GSEs and agency CMO	436,334
Total Fair Value	$ 520,069	$ 505,759