Retirement Plans And Postretirement Benefits (Fair Asset Values Of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 108,377	$ 107,714
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	710	706
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	961	1,023
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,020	26,685
Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	77,686	79,300
United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	78,396	80,006	$ 109,961
United States | Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	710	706
United States | Level 1 | Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	710	706
United States | Level 2 | Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States | Level 3 | Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,981	27,708	$ 26,913
Foreign | Foreign Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	961	1,023
Foreign | Fixed Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,020	26,685
Foreign | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign | Level 1 | Foreign Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign | Level 1 | Fixed Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	961	1,023
Foreign | Level 2 | Foreign Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	961	1,023
Foreign | Level 2 | Fixed Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,020	26,685
Foreign | Level 3 | Foreign Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign | Level 3 | Fixed Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,020	26,685
Foreign | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 29,981	$ 27,708