Employee Benefit Plans Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Components of Net Periodic Benefit Cost (Income) [Abstract]
Minimum Expected Future Employer Pension Contributions, Remainder of Fiscal Year	$ 3,000		$ 3,000
Payment for pension benefits			8,200
Pension Benefits [Member]
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost	2,555	$ 3,275	7,667	$ 9,824
Interest cost	4,697	4,704	14,090	14,114
Expected return on plan assets	(6,043)	(6,841)	(18,129)	(20,525)
Amortization of prior service credit	0	0	0	0
Recognized actuarial loss (gain)	96	1,744	287	5,233
Net periodic benefit cost (credit)	1,305	2,882	3,915	8,646
Other Postretirement Benefits [Member]
Components of Net Periodic Benefit Cost (Income) [Abstract]
Service cost	88	103	263	306
Interest cost	90	79	269	238
Expected return on plan assets	(262)	(230)	(785)	(689)
Amortization of prior service credit	(472)	(459)	(1,418)	(1,377)
Recognized actuarial loss (gain)	(13)	(8)	(37)	(23)
Net periodic benefit cost (credit)	$ (569)	$ (515)	$ (1,708)	$ (1,545)