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Investment Securities (Details Textual) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Investment Securities Information [Line Items]    
Debt Instrument, Collateral Amount $ 1,400,000,000 $ 1,500,000,000
Interest Receivable 159,729,000 167,772,000
Held to maturity allowance for credit loss (64,000) (60,000)
Federal Home Loan Bank Stock 96,000,000 92,000,000
Federal Reserve Bank Stock 98,000,000 88,000,000
Equity securities with readily determinable fair values, Fair Value 11,000,000  
Equity securities 13,000,000  
Held-to-maturity Securities [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 16,000,000 18,000,000
Available-for-sale Securities [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 22,000,000 21,000,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 2,000,000  
Federal Reserve Bank Stock [Member]    
Investment Securities Information [Line Items]    
Interest Receivable 1,000,000 0
US Treasury Securities    
Investment Securities Information [Line Items]    
Held to maturity allowance for credit loss 0 0
US States and Political Subdivisions Debt Securities [Member]    
Investment Securities Information [Line Items]    
Held to maturity allowance for credit loss 0 0
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]    
Investment Securities Information [Line Items]    
Held to maturity allowance for credit loss $ 0 $ 0