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SECURITIES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Unrealized gains (losses) on Agency mortgage-backed securities | $ (1,308,948) | $ (615,216) | $ (1,307,236) | $ (775,020)
Residential Investment securities sold, carrying value | 8,400,000 | $ 6,600,000 | 13,600,000 | $ 9,400,000
Agency |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Unrealized gains (losses) on Agency mortgage-backed securities | $ (744,700) |  | $ 358,000 |

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