Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Assets within Defined Benefit Pension Plans Invested) (Details) - Pension Plans [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value of Plan Assets	$ 172,246	$ 329,796	$ 325,790
Cash and Cash Equivalents [Member]
Fair Value of Plan Assets	3,690	4,269
Global Equities [Member]
Fair Value of Plan Assets	33,974	66,517
Fixed Income Securities [Member]
Fair Value of Plan Assets	126,358	241,911
Alternative Securities [Member]
Fair Value of Plan Assets	8,224	17,099
Level 1
Fair Value of Plan Assets	153,445	270,391
Level 1 | Cash and Cash Equivalents [Member]
Fair Value of Plan Assets	3,690	4,269
Level 1 | Global Equities [Member]
Fair Value of Plan Assets	33,974	66,517
Level 1 | Fixed Income Securities [Member]
Fair Value of Plan Assets	107,557	182,506
Level 1 | Alternative Securities [Member]
Fair Value of Plan Assets	8,224	17,099
Level 2 [Member]
Fair Value of Plan Assets	18,801	59,405
Level 2 [Member] | Cash and Cash Equivalents [Member]
Fair Value of Plan Assets	0	0
Level 2 [Member] | Global Equities [Member]
Fair Value of Plan Assets	0	0
Level 2 [Member] | Fixed Income Securities [Member]
Fair Value of Plan Assets	18,801	59,405
Level 2 [Member] | Alternative Securities [Member]
Fair Value of Plan Assets	$ 0	$ 0