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DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | $ 18,504,223 | $ 19,339,867
Derivative Asset | 295,131 | 269,776
Derivative liabilities | (293,926) | (263,131)
Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 17,504,223 | 18,339,867
Derivative Asset | 293,566 | 262,880
Derivative liabilities | (293,756) | (263,131)
Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 1,000,000 | 1,000,000
Derivative Asset | 1,565 | 6,896
Derivative liabilities | (170) | 0
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other assets | Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 2,202,947 | 2,172,714
Derivative Asset | 8,012 | 13,232
Derivative liabilities | (123,248) | (104,343)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities | Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 2,202,947 | 2,172,714
Derivative Asset | 123,058 | 104,092
Derivative liabilities | (8,012) | (13,232)
Foreign Exchange | Matched interest rate swaps | Accrued interest and other assets | Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 6,571,536 | 7,021,569
Derivative Asset | 99,421 | 84,731
Derivative liabilities | (63,075) | (60,825)
Foreign Exchange | Matched interest rate swaps | Accrued interest and other liabilities | Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 6,526,793 | 6,972,870
Derivative Asset | 63,075 | 60,825
Derivative liabilities | $ (99,421) | $ (84,731)
Cash Flow Hedging | Interest Rate Floor | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other Liabilities | Other Liabilities
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets
Cash Flow Hedging | Interest Rate Floor | Accrued interest and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | $ 1,000,000 |
Cash Flow Hedging | Interest Rate Floor | Accrued interest and other liabilities | Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | $ 1,000,000 | $ 1,000,000

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