Pension and Postretirement Plans (Total Benefit/Cost) (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Cost (Benefit)	$ (23,253)	$ (29,056)
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Service Cost	12,192	14,034
Interest cost	6,421	11,194
Expected return on assets	(41,971)	(41,690)
Amortization of prior service credit	(519)	(494)
Recognized actuarial gain	0	(12,518)
Net Periodic Cost (Benefit)	(23,877)	(29,474)
Special separation benefit expense	624	418
Net Periodic Cost (Benefit)	(23,253)	(29,056)
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Service Cost	239	287
Interest cost	1,197	1,128
Net Periodic Cost (Benefit)	1,436	1,415
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	10	14
Recognized actuarial gain	(379)	(469)
Net Periodic Cost (Benefit)	$ (369)	$ (455)