SECURITIES - Amortized Cost and Fair Value By Contractual Maturity (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Available for sale, Amortized Cost
Within one year	$ 4,328,000
One to five years	279,979,000
Five to ten years	169,206,000
Beyond ten years	5,145,000
Pass-through MBS issued by GSEs and Agency CMO	629,891,000
Amortized Cost	1,088,549,000	$ 1,574,094,000
Available for sale, Fair Value
Within one year	4,260,000
One to five years	256,086,000
Five to ten years	151,713,000
Beyond ten years	4,496,000
Pass-through MBS issued by GSEs and Agency CMO	546,372,000
Total	962,927,000	1,563,711,000
Held-to-maturity, Amortized Cost
One to five years	10,000,000
Five to ten years	88,057,000
Pass-through MBS issued by GSEs and agency CMO	493,346,000
Total, Held-to-maturity, Amortized Cost	591,403,000
Held-to-maturity, Fair Value
One to five years	9,301,000
Five to ten years	74,301,000
Pass-through MBS issued by GSEs and agency CMO	427,452,000
Fair Value	$ 511,054,000	$ 177,354,000	$ 0