Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 302	$ 304	$ 906	$ 913
Interest Cost	6,431	6,756	19,293	20,270
Expected Return on Plan Assets	(7,991)	(9,867)	(23,973)	(29,602)
Amortization of Prior Service Credits	0	0	0	0
Amortization of Actuarial Loss (Gain)	1,567	185	4,699	555
Net Periodic Benefit Cost (Credit)	309	(2,622)	925	(7,864)
Other Post-Employment Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	0	0	0	0
Interest Cost	2,758	3,261	8,274	9,783
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Credits	(601)	(601)	(1,804)	(1,804)
Amortization of Actuarial Loss (Gain)	(70)	0	(209)	0
Net Periodic Benefit Cost (Credit)	$ 2,087	$ 2,660	$ 6,261	$ 7,979