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DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Detail) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 19,339,867 $ 19,828,103
Derivative Asset 262,880  
Derivative Liability (270,027) $ (357,698)
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Accrued interest and other assets
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 18,339,867 $ 19,828,103
Derivative Asset 262,880 357,698
Derivative Liability (263,131) (357,698)
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 1,000,000 0
Derivative Asset 0 0
Derivative Liability (6,896) 0
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 2,172,714 2,206,351
Derivative Asset 104,092 147,759
Derivative Liability (13,232) (5,057)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 2,172,714 2,206,351
Derivative Asset 13,232 5,057
Derivative Liability (104,343) (147,759)
Foreign Exchange | Matched interest rate swaps | Accrued interest and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 6,972,870 7,681,006
Derivative Asset 60,825 93,804
Derivative Liability (84,731) (111,078)
Foreign Exchange | Matched interest rate swaps | Accrued interest and other assets    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 7,021,569 7,734,395
Derivative Asset 84,731 111,078
Derivative Liability $ (60,825) $ (93,804)
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
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 $ 0
Derivative [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Derivative [Member] | Accrued interest and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 2,200,000 $ 2,200,000
Derivative [Member] | Foreign Exchange    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Derivative [Member] | Foreign Exchange | Accrued interest and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 7,000,000 $ 7,700,000