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Pension Plans and Other Postretirement Benefits (Fair Value Of The Pension And Postretirement Benefit Plans Assets By Asset Category) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 553,171	$ 483,823	$ 384,552
Pension Benefits | United States | Fair Value | Equity securities U.S. Companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	397,981	338,564
Pension Benefits | United States | Fair Value | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21,313	20,751
Pension Benefits | United States | Fair Value | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	70	0
Pension Benefits | United States | Fair Value | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,680
Pension Benefits | United States | Fair Value | Money market instruments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,771	17,618
Pension Benefits | United States | Fair Value | Pooled investment funds Fixed Income Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,420	9,576
Pension Benefits | United States | Fair Value | Pooled Investment Funds International Equities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19,341	17,378
Pension Benefits | United States | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	463,896	403,887
Pension Benefits | United States | Level 1 | Equity securities U.S. Companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	397,981	338,564
Pension Benefits | United States | Level 1 | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21,313	20,751
Pension Benefits | United States | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	70	0
Pension Benefits | United States | Level 1 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 1 | Money market instruments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,771	17,618
Pension Benefits | United States | Level 1 | Pooled investment funds Fixed Income Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,420	9,576
Pension Benefits | United States | Level 1 | Pooled Investment Funds International Equities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19,341	17,378
Pension Benefits | United States | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,680
Pension Benefits | United States | Level 2 | Equity securities U.S. Companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 2 | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 2 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,680
Pension Benefits | United States | Level 2 | Money market instruments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 2 | Pooled investment funds Fixed Income Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 2 | Pooled Investment Funds International Equities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Equity securities U.S. Companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Money market instruments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Pooled investment funds Fixed Income Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Level 3 | Pooled Investment Funds International Equities Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | United States | Common collective trusts measured at net asset value | Pooled Investment Funds Common Collective Trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	89,275	78,256
Pension Benefits | Foreign Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	212,617	189,455	163,746
Pension Benefits | Foreign Retirement Plans | Fair Value | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	714	691
Pension Benefits | Foreign Retirement Plans | Fair Value | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	659	131
Pension Benefits | Foreign Retirement Plans | Fair Value | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,579	10,706
Pension Benefits | Foreign Retirement Plans | Fair Value | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	575	663
Pension Benefits | Foreign Retirement Plans | Fair Value | Pooled investment funds Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	639	582
Pension Benefits | Foreign Retirement Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,482	2,050
Pension Benefits | Foreign Retirement Plans | Level 1 | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	714	691
Pension Benefits | Foreign Retirement Plans | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	659	131
Pension Benefits | Foreign Retirement Plans | Level 1 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 1 | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	470	646
Pension Benefits | Foreign Retirement Plans | Level 1 | Pooled investment funds Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	639	582
Pension Benefits | Foreign Retirement Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,684	10,723
Pension Benefits | Foreign Retirement Plans | Level 2 | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 2 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,579	10,706
Pension Benefits | Foreign Retirement Plans | Level 2 | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	105	17
Pension Benefits | Foreign Retirement Plans | Level 2 | Pooled investment funds Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 3 | Equity securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 3 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 3 | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Level 3 | Pooled investment funds Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pension Benefits | Foreign Retirement Plans | Common collective trusts measured at net asset value | Pooled investment funds Equity securities - international companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,062	13,074
Pension Benefits | Foreign Retirement Plans | Common collective trusts measured at net asset value | Pooled investment funds Equity Securities International companies
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	67,593	60,945
Pension Benefits | Foreign Retirement Plans | Common collective trusts measured at net asset value | Pooled investment funds Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	77,766	67,094
Pension Benefits | Foreign Retirement Plans | Common collective trusts measured at net asset value | Pooled investment funds Diversified growth funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39,030	35,569
Postretirement Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21,372	22,092	$ 22,378
Postretirement Benefits | United States | Fair Value | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21,372	22,092
Postretirement Benefits | United States | Level 1 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Postretirement Benefits | United States | Level 2 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21,372	22,092
Postretirement Benefits | United States | Level 3 | Insurance contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

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+ References

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+ References

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