Pension and Other Postretirement Benefit Plans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Directors' Plan [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 200,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 32,000
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	15,000
Employee Pension Plan [Member] | Savings Bank [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 0