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SECURITIES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Unrealized gains (losses) on agency mortgage-backed securities | $ 1,723,713 | $ (2,713,126) | $ 160,841 | $ (4,020,362)
Residential Investment securities sold, carrying value | 2,800,000 | 6,900,000 | 16,000,000 | 20,500,000
Agency |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Unrealized gains (losses) on agency mortgage-backed securities | $ 1,700,000 | $ (2,000,000) | $ 762,800 | $ (2,400,000)

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