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SECURITIES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Unrealized gains (losses) on agency mortgage-backed securities | $ (568,745) | $ (1,308,948) | $ (1,562,872) | $ (1,307,236)
Residential Investment securities sold, carrying value | 5,200,000 | 8,400,000 | 13,300,000 | 13,600,000
Agency |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Unrealized gains (losses) on agency mortgage-backed securities | $ (274,900) | $ (744,700) | $ (948,900) | $ (358,000)

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