Pension Plans (Total Benefit/Cost) (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Cost (Benefit)	$ (20,401)	$ (23,253)
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	11,580	12,192
Interest cost	8,695	6,421
Expected return on assets	(44,280)	(41,971)
Amortization of prior service credit	(496)	(519)
Net Periodic Cost (Benefit)	(24,501)	(23,877)
Special separation benefit expense	4,100	624
Net Periodic Cost (Benefit)	(20,401)	(23,253)
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	289	239
Interest cost	1,155	1,197
Net Periodic Cost (Benefit)	$ 1,444	$ 1,436