SECURITIES - Amortized Cost and Fair Value By Contractual Maturity (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Available for sale, Amortized Cost
Within one year	$ 3,904,000
One to five years	276,581,000
Five to ten years	150,824,000
Beyond ten years	5,145,000
Pass-through MBS issued by GSEs and Agency CMO	657,232,000
Amortized Cost	1,093,686,000	$ 1,574,094,000
Available for sale, Fair Value
Within one year	3,851,000
One to five years	259,282,000
Five to ten years	140,475,000
Beyond ten years	4,626,000
Pass-through MBS issued by GSEs and Agency CMO	599,523,000
Total	1,007,757,000	1,563,711,000
Held-to-maturity, Amortized Cost
One to five years	10,000,000
Five to ten years	78,957,000
Beyond ten years	5,000,000
Pass-through MBS issued by GSEs and agency CMO	486,008,000
Total	579,965,000
Held-to-maturity, Fair Value
One to five years	9,622,000
Five to ten years	70,134,000
Beyond ten years	5,000,000
Pass-through MBS issued by GSEs and agency CMO	447,114,000
Fair Value	$ 531,870,000	$ 177,354,000	$ 0