Pension and Other Postretirement Benefits Plans - The Components of the Net Pension (Benefit) Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Employee Pension Plan [Member]
Interest cost	$ 203	$ 138
Amortization of unrecognized loss		1
Expected return on plan assets	(277)	(257)
Net postretirement benefit expense	(74)	(118)
Directors' Plan [Member]
Service cost	2	3
Interest cost	15	11
Amortization of unrecognized loss	(40)	(7)
Net postretirement benefit expense	(23)	7
Other Post Retirement Benefit Plan Defined Benefit [Member]
Service cost	40	67
Interest cost	95	70
Amortization of unrecognized loss	(60)
Amortization of past service credit		(7)
Net postretirement benefit expense	$ 75	$ 130