Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pension Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 275	$ 302	$ 550	$ 604
Interest Cost	6,343	6,431	12,685	12,862
Expected Return on Plan Assets	(7,565)	(7,991)	(15,130)	(15,982)
Amortization of Prior Service Credits	0	0	0	0
Amortization of Actuarial Loss (Gain)	2,158	1,566	4,316	3,132
Net Periodic Benefit Cost	1,211	308	2,421	616
Other Post-Employment Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	38	0	70	0
Interest Cost	2,987	2,758	5,892	5,516
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Credits	(601)	(602)	(1,202)	(1,203)
Amortization of Actuarial Loss (Gain)	(685)	(69)	(1,369)	(139)
Net Periodic Benefit Cost	$ 1,739	$ 2,087	$ 3,391	$ 4,174