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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Pension Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 275	$ 302	$ 825	$ 906
Interest Cost	6,343	6,431	19,028	19,293
Expected Return on Plan Assets	(7,565)	(7,991)	(22,695)	(23,973)
Amortization of Prior Service Credits	0	0	0	0
Amortization of Actuarial Loss (Gain)	2,159	1,567	6,475	4,699
Net Periodic Benefit Cost	1,212	309	3,633	925
OPEB
Defined Contribution Plan Disclosure [Line Items]
Service Cost	38	0	108	0
Interest Cost	2,992	2,758	8,884	8,274
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Credits	(601)	(601)	(1,803)	(1,804)
Amortization of Actuarial Loss (Gain)	(683)	(70)	(2,052)	(209)
Net Periodic Benefit Cost	$ 1,746	$ 2,087	$ 5,137	$ 6,261