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FINANCIAL DERIVATIVES - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |  |
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Accrued interest receivable (includes $16,764 and $12,514, respectively, related to consolidated trusts) | Accrued interest receivable (includes $16,764 and $12,514, respectively, related to consolidated trusts) |
Gain expected to be reclassified from AOCI to earnings over next 12 months | $ 13,600,000 |  |
Gain (loss) from interest rate swaps designated as cash flow hedges reclassified to earnings | 0 | $ 0 | $ 0
Financial derivatives, net payable position | 0 | 0 |
Notional amount | 25,779,468,000 | 23,878,611,000 |
Exchange Cleared |  |  |
Derivative [Line Items] |  |  |
Notional amount | 20,500,000,000 | 19,500,000,000 |
Interest Rate Swap |  |  |
Derivative [Line Items] |  |  |
Notional amount | 25,800,000,000 | 23,900,000,000 |
Cleared Swaps |  |  |
Derivative [Line Items] |  |  |
Accrued interest on cleared swaps | 16,400,000 | 6,100,000 |
Uncleared Swaps |  |  |
Derivative [Line Items] |  |  |
Accrued interest payable | $ 6,500,000 | $ 3,600,000 |

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