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Retirement Plans (Details Textuals) (Details) - Pension Plan [Member] - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
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Sep. 30, 2024 | Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Defined Benefit Plan, Description | The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet the eligibility requirements. The benefits are based primarily on years of service and the employee’s eligible compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Retirement plans of acquired entities are typically merged into the RAP depending on the terms of the merger agreement, and, as applicable, credit is usually applied to employees for years of service at the acquired institution for vesting and eligibility purposes. |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 0 | $ 0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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