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Pension and Other Postretirement Benefit Plans (Details) - USD ($)
 9 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Directors' Plan [Member]    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year   $ 100,000
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 24,000  
Other Postretirement Benefits Plan [Member]    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year   $ 300,000
Defined Benefit Plan, Plan Assets, Contributions by Employer 114,000  
Employee Pension Plan [Member] | Savings Bank [Member]    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 0