Pensions and Other Postretirement Plans (Consolidated Balance Sheet) (Details 2) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Noncurrent asset	$ 1,658,046	$ 2,306,514
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent asset	1,658,046	2,306,514
Current liability	0	0
Noncurrent liability	0	0
Recognized asset (liability)	1,658,046	2,306,514
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent asset	0	0
Current liability	(6,570)	(6,334)
Noncurrent liability	(83,448)	(106,372)
Recognized asset (liability)	(90,018)	(112,706)
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	(541)	(671)
Noncurrent liability	(2,859)	(4,051)
Recognized asset (liability)	$ (3,400)	$ (4,722)