Pension and Postretirement Plans (Total Benefit/Cost) (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4,993	$ 5,877	$ 11,024	$ 11,479
Net Periodic Cost (Benefit)			(90,971)	(45,413)
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4,993	5,877	11,024	11,479
Interest cost	7,611	6,754	15,281	13,408
Expected return on assets	(41,963)	(33,702)	(83,926)	(68,278)
Amortization of prior service cost (credit)	709	712	1,418	1,423
Recognized actuarial loss (gain)	(17,539)	(1,671)	(34,768)	(4,563)
Net Periodic Cost (Benefit)	(46,189)	(22,030)	(90,971)	(46,531)
Special separation benefit expense	0	1,118	0	1,118
Net Periodic Cost (Benefit)	(46,189)	(20,912)	(90,971)	(45,413)
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	228	256	456	511
Interest cost	822	735	1,644	1,471
Amortization of prior service cost (credit)	9	82	18	165
Recognized actuarial loss (gain)	167	1,483	333	2,965
Net Periodic Cost (Benefit)	1,226	2,556	2,451	5,112
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	25	10	49	46
Amortization of prior service cost (credit)	(2)	(2)	(4)	(4)
Recognized actuarial loss (gain)	(710)	(736)	(1,421)	(1,755)
Net Periodic Cost (Benefit)	$ (687)	$ (728)	$ (1,376)	$ (1,713)