SECURITIES - Securities Held-to-maturity Major Categories (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 579,965,000	$ 179,309,000
Gross Unrecognized Gains	328,000	59,000
Gross Unrecognized Losses	(48,423,000)	(2,014,000)
Fair Value	531,870,000	177,354,000	$ 0
Agency Notes
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	88,957,000
Gross Unrecognized Losses	(9,201,000)
Fair Value	79,756,000
Corporate Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	5,000,000
Fair Value	5,000,000
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs")
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	287,959,000	118,382,000
Gross Unrecognized Gains		59,000
Gross Unrecognized Losses	(26,529,000)	(1,141,000)
Fair Value	261,430,000	117,300,000
Agency collateralized mortgage obligations ("CMOs")
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	198,049,000	60,927,000
Gross Unrecognized Gains	328,000
Gross Unrecognized Losses	(12,693,000)	(873,000)
Fair Value	$ 185,684,000	$ 60,054,000