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DERIVATIVE INSTRUMENTS - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Jul. 25, 2023 | Dec. 31, 2022
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivatives asset, Fair Value |  | $ 70,625 |  |  | $ 70,625 |  |  | $ 2,292
Derivatives asset, notional amount |  | 5,233,632 |  |  | 5,233,632 |  |  | 39,579
Change in fair value of derivative instruments |  | 46,186 | $ 10 | $ 39 | 46,172 | $ 224 |  |
Change in fair value of derivative instruments |  |  |  |  | 46,172 | 224 |  |
Interest rate swaps |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Notional amount | $ 300,000 |  |  |  |  |  |  |
Term of cash flow hedge contracts | 5 years |  |  |  |  |  |  |
Derivatives asset, notional amount |  |  |  |  |  |  | $ 3,100,000 |
Cash flow hedges |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivatives asset, Fair Value |  | 5,874 |  |  | 5,874 |  |  | 0
Cash flow hedge reclassified to earnings |  |  |  |  | 4,100 |  |  |
Derivatives asset, notional amount |  | 300,000 |  |  | 300,000 |  |  | 0
Cash flow hedges |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Cash flow hedges |  | 4,200 |  |  | 4,200 |  |  |
Interest rate swaptions |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivatives asset, Fair Value |  | 27,003 |  |  | 27,003 |  |  | 0
Derivatives asset, notional amount |  | 3,093,000 |  |  | 3,093,000 |  |  | 0
Payments for issuance of derivatives |  | 15,700 |  |  |  |  |  |
Change in fair value of derivative instruments |  | 11,300 |  |  |  |  |  |
Contingent forward loan sale agreement |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivatives asset, Fair Value |  | 34,902 |  |  | 34,902 |  |  | 0
Derivatives asset, notional amount |  | 1,803,869 |  |  | 1,803,869 |  | $ 1,800,000 | 0
Change in fair value of derivative instruments |  | $ 34,900 |  |  | $ 34,900 |  |  |
Mortgages price percent |  | 87.25% |  |  | 87.25% |  |  |
Interest rate swaps on loans |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Derivatives asset, Fair Value |  | $ 2,708 |  |  | $ 2,708 |  |  | 2,134
Derivatives asset, notional amount |  | 32,166 |  |  | 32,166 |  |  | $ 33,694
Change in fair value of derivative instruments |  | $ 19 |  | $ 38 | $ 7 | $ 200 |  |

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