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Investment Securities (Details Textual) - USD ($) | Mar. 31, 2025 | Dec. 31, 2024
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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

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