Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Components of net periodic benefit cost [Abstract]
Contribution made to pension and postretirement plans			$ 0
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 0	$ 0	0	$ 0
Interest cost	304	221	606	444
Expected return on plan assets	(661)	(796)	(1,341)	(1,613)
Amortization of net gain	0	0	0	0
Amortization of prior service cost (credit)	0	0	0	0
Net periodic benefit	(357)	(575)	(735)	(1,169)
Other Postretirement Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	3	(9)	5	9
Interest cost	66	51	132	103
Expected return on plan assets	(290)	(333)	(579)	(666)
Amortization of net gain	(114)	(426)	(228)	(504)
Amortization of prior service cost (credit)	3	123	6	(157)
Net periodic benefit	$ (332)	$ (594)	$ (664)	$ (1,215)