Components of Pension and Other Postretirement Benefit Plans Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Pension Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 300	$ 275
Interest Cost	5,730	6,342
Expected Return on Plan Assets	(7,479)	(7,565)
Amortization of Prior Service Credits	0	0
Recognized Net Actuarial Loss (Gain)	2,468	2,158
Net Periodic Benefit Cost	1,019	1,210
Other Postretirement Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	29	32
Interest Cost	2,347	2,905
Expected Return on Plan Assets	0	0
Amortization of Prior Service Credits	(601)	(601)
Recognized Net Actuarial Loss (Gain)	(1,020)	(684)
Net Periodic Benefit Cost	$ 755	$ 1,652