Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension and Supplemental Executive Retirement Plans
Components of Net Periodic Benefit Cost [Abstract]
Company service cost	$ 0	$ 1,757
Interest cost	3,682	2,877
Expected return on plan assets	(3,581)	(4,952)
Net actuarial losses (gains)	597	1,183
Prior service cost (credit)	86	(53)
Cost of settlements and curtailments	7,847	0
Net periodic benefit cost (benefit)	8,631	812
Other Postretirement Benefit Plans
Components of Net Periodic Benefit Cost [Abstract]
Company service cost	386	348
Interest cost	398	177
Expected return on plan assets	(2,063)	(2,625)
Net actuarial losses (gains)	(64)	(754)
Prior service cost (credit)	465	122
Cost of settlements and curtailments	0	0
Net periodic benefit cost (benefit)	$ (878)	$ (2,732)