Retirement Plans And Postretirement Benefits (Pension Plans With An Accumulated Benefit Obligation In Excess Of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
U.S.
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets
Accumulated benefit obligation	$ 135,810	$ 126,985
Fair value of plan assets	107,832	99,845
Foreign [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets
Accumulated benefit obligation	26,829	20,601
Fair value of plan assets	$ 17,985	$ 14,396