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SECURITIES - Securities Held-to-maturity Major Categories (Details) - USD ($) | Sep. 30, 2022 | Dec. 31, 2021 | Jan. 01, 2021
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Schedule of Held-to-maturity Securities [Line Items] |  |  |
Debt Securities, Held-to-maturity, Total | $ 591,403,000 | $ 179,309,000 |
Gross Unrecognized Gains |  | 59,000 |
Gross Unrecognized Losses | (80,349,000) | (2,014,000) |
Fair Value | 511,054,000 | 177,354,000 | $ 0
Agency Notes |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Debt Securities, Held-to-maturity, Total | 89,057,000 |  |
Gross Unrecognized Losses | (14,168,000) |  |
Fair Value | 74,889,000 |  |
Corporate Securities |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Debt Securities, Held-to-maturity, Total | 9,000,000 |  |
Gross Unrecognized Losses | (287,000) |  |
Fair Value | 8,713,000 |  |
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs") |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Debt Securities, Held-to-maturity, Total | 281,739,000 | 118,382,000 |
Gross Unrecognized Gains |  | 59,000 |
Gross Unrecognized Losses | (43,405,000) | (1,141,000) |
Fair Value | 238,334,000 | 117,300,000 |
Agency collateralized mortgage obligations ("CMOs") |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |
Debt Securities, Held-to-maturity, Total | 211,607,000 | 60,927,000 |
Gross Unrecognized Losses | (22,489,000) | (873,000) |
Fair Value | $ 189,118,000 | $ 60,054,000 |

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