Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pension Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 275	$ 302
Interest Cost	6,342	6,431
Expected Return on Plan Assets	(7,565)	(7,991)
Amortization of Prior Service Credits	0	0
Amortization of Actuarial Loss (Gain)	2,158	1,566
Net Periodic Benefit Cost	1,210	308
Other Post-Employment Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	32	0
Interest Cost	2,905	2,758
Expected Return on Plan Assets	0	0
Amortization of Prior Service Credits	(601)	(601)
Amortization of Actuarial Loss (Gain)	(684)	(70)
Net Periodic Benefit Cost	$ 1,652	$ 2,087