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Commitments and Contingencies - Amounts Related to Fair Value of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2021
Derivative [Line Items]      
Notional Amount $ 22,489,009 $ 19,865,937  
Derivative - interest rate swaps:      
Derivative [Line Items]      
Notional Amount     $ 300,000
Derivatives designated as hedging instruments:      
Derivative [Line Items]      
Notional Amount 780,322 780,322  
Derivatives designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Notional Amount   480,300  
Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Notional Amount 21,708,687 19,085,615  
Derivatives not designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Notional Amount 18,685,777 16,209,499  
Derivatives not designated as hedging instruments: | Foreign currency derivatives      
Derivative [Line Items]      
Notional Amount 2,343,733 1,688,338  
Derivatives not designated as hedging instruments: | Mortgage banking derivatives      
Derivative [Line Items]      
Notional Amount 25,718 45,752  
Derivatives not designated as hedging instruments: | Credit Default Swap      
Derivative [Line Items]      
Notional Amount 653,459 1,142,026  
Other Assets      
Derivative [Line Items]      
Other Assets 182,673 444,263  
Other Assets | Derivatives designated as hedging instruments:      
Derivative [Line Items]      
Other Assets 1,319 2,419  
Other Assets | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Other Assets 181,354 441,844  
Other Assets | Derivatives not designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Other Assets 162,191 423,683  
Other Assets | Derivatives not designated as hedging instruments: | Foreign currency derivatives      
Derivative [Line Items]      
Other Assets 19,140 18,011  
Other Assets | Derivatives not designated as hedging instruments: | Mortgage banking derivatives      
Derivative [Line Items]      
Other Assets 23 150  
Other Assets | Derivatives not designated as hedging instruments: | Credit Default Swap      
Derivative [Line Items]      
Other Assets 0 0  
Other Liabilities      
Derivative [Line Items]      
Other Liabilities 184,162 454,200  
Other Liabilities | Derivatives designated as hedging instruments:      
Derivative [Line Items]      
Other Liabilities 4,088 13,993  
Other Liabilities | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Other Liabilities 180,074 440,207  
Other Liabilities | Derivatives not designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Other Liabilities 161,911 423,492  
Other Liabilities | Derivatives not designated as hedging instruments: | Foreign currency derivatives      
Derivative [Line Items]      
Other Liabilities 18,031 16,488  
Other Liabilities | Derivatives not designated as hedging instruments: | Mortgage banking derivatives      
Derivative [Line Items]      
Other Liabilities 78 192  
Other Liabilities | Derivatives not designated as hedging instruments: | Credit Default Swap      
Derivative [Line Items]      
Other Liabilities 54 35  
Fair value hedge interest rate swaps | Derivatives designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Notional Amount 780,322 780,322  
Fair value hedge interest rate swaps | Derivatives not designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Notional Amount 10,400    
Fair value hedge interest rate swaps | Other Assets | Derivatives designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Other Assets 1,319 2,419  
Fair value hedge interest rate swaps | Other Liabilities | Derivatives designated as hedging instruments: | Derivative - interest rate swaps:      
Derivative [Line Items]      
Other Liabilities $ 4,088 $ 13,993