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Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of lending-related and other commitments [Line Items] |  |  |
Investment, Proportional Amortization Method, Elected, Amount | $ 203,000 | $ 215,000 |
Investment Program, Proportional Amortization Method, Elected, Impairment Loss | 0 | 0 | $ 0
Loans repurchased under make whole requests | 3,000 | 5,000 |
Loans Sold To Outside Investors Loss Reimbursement Settlement Paid | $ 0 | 0 |
Make Whole Requests, Loan Origination Date, Majority | Jan. 01, 2021 |  |
Loans Sold To Outside Investors Original Amount | $ 4,400,000 |  |
Loans sold to outside investors remaining outstanding amount | 2,600,000 |  |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount | 38,776 | 34,776 |
Financing Receivable, before Allowance for Credit Loss | 29,768,586 | 29,216,218 |
Residential Mortgage [Member] |  |  |
Schedule of lending-related and other commitments [Line Items] |  |  |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount | 553 | 835 |
Residential Mortgage [Member] | Recourse [Member] |  |  |
Schedule of lending-related and other commitments [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | 14,000 | 15,000 |
Residential Mortgage [Member] | Recourse [Member] | Credit Risk [Member] |  |  |
Schedule of lending-related and other commitments [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | 134,000 | 16,000 |
Loss on Sale of Investments | 0 | 0 |
Affordable Housing Projects and Other [Member] |  |  |
Schedule of lending-related and other commitments [Line Items] |  |  |
Other Investments | 205,000 | 219,000 |
Investment Program, Proportional Amortization Method, Applied, Amortization Expense | 35,000 | 34,000 | $ 34,000
Accrued Liabilities | 30,000 | 27,000 |
Private SBA Loan Fund [Member] |  |  |
Schedule of lending-related and other commitments [Line Items] |  |  |
Equity Securities, FV-NI | 3,000 |  |
Loan Pool CRA Investments [Member] |  |  |
Schedule of lending-related and other commitments [Line Items] |  |  |
Other Investments | $ 54,000 | $ 40,000 |

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