SECURITIES - Amortized Cost and Fair Value By Contractual Maturity, Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Held-to-maturity, Amortized Cost
One to five years	$ 10,000
Five to ten years	88,258
Pass-through MBS issued by GSEs and agency CMO	507,384
Total Amortized Cost	605,642
Held-to-maturity, Fair Value
One to five years	9,407
Five to ten years	75,169
Pass-through MBS issued by GSEs and agency CMO	447,996
Total Fair Value	$ 532,572	$ 505,759