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Investment Securities (Details Textual) - USD ($)
shares in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Investment Securities Information [Line Items]              
Proceeds from Sale of Debt Securities, Available-for-sale $ 715,000,000       $ 715,066,000 $ 110,177,000 $ 158,708,000
Visa B Shares, Amount Sold 1            
Gain (Loss) on Sale of Investments $ 65,000,000            
Proceeds from sales of AFS investment securities       $ 51,000,000 715,066,000 110,177,000 $ 158,708,000
Debt Instrument, Collateral Amount 1,600,000,000 $ 2,300,000,000     1,600,000,000 2,300,000,000  
Interest receivable 169,569,000 144,449,000     169,569,000 144,449,000  
Debt Securities, Held-to-maturity, Nonaccrual, Interest Income         0 0  
Debt Securities, HTM, Past Due Status 0 0     0 0  
Held to maturity allowance for credit loss (75,000) (54,000)     (75,000) (54,000)  
Federal Home Loan Bank Stock 143,000,000 209,000,000     143,000,000 209,000,000  
Federal Reserve Bank Stock 87,000,000 87,000,000     87,000,000 87,000,000  
Equity Securities with Readily Determined Fair Value 7,000,000 6,000,000     7,000,000 6,000,000  
Equity Securities without Readily Determinable Fair Value, Amount 35,000,000 19,000,000     35,000,000 19,000,000  
FFELP asset backed securities              
Investment Securities Information [Line Items]              
Proceeds from Sale of Debt Securities, Available-for-sale     $ 107,000,000        
Held-to-maturity Securities              
Investment Securities Information [Line Items]              
Interest receivable 18,000,000 19,000,000     18,000,000 19,000,000  
Available-for-sale Securities [Member]              
Investment Securities Information [Line Items]              
Interest receivable 15,000,000 9,000,000     15,000,000 9,000,000  
Federal Reserve Bank Stock [Member]              
Investment Securities Information [Line Items]              
Interest receivable 0 0     0 0  
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]              
Investment Securities Information [Line Items]              
Interest receivable 4,000,000 3,000,000     4,000,000 3,000,000  
US States and Political Subdivisions Debt Securities [Member]              
Investment Securities Information [Line Items]              
Proceeds from Sale of Debt Securities, Available-for-sale   110,000,000          
Gain (Loss) on Sale of Investments   (2,000,000)          
Visa B Shares              
Investment Securities Information [Line Items]              
Gain (Loss) on Sale of Investments (6,000,000)            
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]              
Investment Securities Information [Line Items]              
Held to maturity allowance for credit loss 0 0     0 0  
US Treasury Securities [Member]              
Investment Securities Information [Line Items]              
Held to maturity allowance for credit loss 0 0     0 0  
US States and Political Subdivisions Debt Securities [Member]              
Investment Securities Information [Line Items]              
Held to maturity allowance for credit loss $ 0 $ 0     $ 0 $ 0