Pension and Postretirement Benefits (Plan Assets) (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
United States
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 482,553	$ 425,792
Return on plan assets	47,992	69,663
Company contributions	1,412	20,552
Benefits paid	(53,250)	(33,454)
Settlements	(1,027)	0
Ending balance	477,680	482,553
Fair Value	482,553	482,553
United States \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,994
Ending balance	5,986	4,994
Fair Value	4,994	4,994
United States \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	477,559
Ending balance	471,694	477,559
Fair Value	477,559	477,559
United States \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Cash and Cash Equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,994
Ending balance	5,986	4,994
Fair Value	4,994	4,994
United States \| Cash and Cash Equivalents \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	4,994
Ending balance	5,986	4,994
Fair Value	4,994	4,994
United States \| Cash and Cash Equivalents \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Cash and Cash Equivalents \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Global Equity
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	135,350
Ending balance	142,401	135,350
Fair Value	135,350	135,350
United States \| Global Equity \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Global Equity \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	135,350
Ending balance	142,401	135,350
Fair Value	135,350	135,350
United States \| Global Equity \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Global Real Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	60,523
Ending balance	61,604	60,523
Fair Value	60,523	60,523
United States \| Global Real Assets \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Global Real Assets \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	60,523
Ending balance	61,604	60,523
Fair Value	60,523	60,523
United States \| Global Real Assets \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Diversified Credit
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	56,375
Ending balance	66,995	56,375
Fair Value	56,375	56,375
United States \| Diversified Credit \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Diversified Credit \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	56,375
Ending balance	66,995	56,375
Fair Value	56,375	56,375
United States \| Diversified Credit \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Liability Driven Investment
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	225,311
Ending balance	200,694	225,311
Fair Value	225,311	225,311
United States \| Liability Driven Investment \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
United States \| Liability Driven Investment \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	225,311
Ending balance	200,694	225,311
Fair Value	225,311	225,311
United States \| Liability Driven Investment \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	262,559	232,175
Return on plan assets	21,897	23,793
Company contributions	11,279	16,782
Benefits paid	(15,700)	(14,526)
Employee contributions	80	78
Settlements	(2,939)	(3,688)
Currency translation impact and other	10,132	7,945
Ending balance	287,308	262,559
Fair Value	262,559	232,175
Foreign Plan \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	5,026
Ending balance	2,304	5,026
Fair Value	5,026	5,026
Foreign Plan \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	187,742
Ending balance	209,052	187,742
Fair Value	187,742	187,742
Foreign Plan \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	69,791
Ending balance	75,952	69,791
Fair Value	69,791	69,791
Foreign Plan \| Cash and Cash Equivalents
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	5,026
Ending balance	2,304	5,026
Fair Value	5,026	5,026
Foreign Plan \| Cash and Cash Equivalents \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	5,026
Ending balance	2,304	5,026
Fair Value	5,026	5,026
Foreign Plan \| Cash and Cash Equivalents \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Cash and Cash Equivalents \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Global Equity
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,411
Ending balance	2,451	2,411
Fair Value	2,411	2,411
Foreign Plan \| Global Equity \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Global Equity \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,411
Ending balance	2,451	2,411
Fair Value	2,411	2,411
Foreign Plan \| Global Equity \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| North American Companies
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,501
Ending balance	2,555	2,501
Fair Value	2,501	2,501
Foreign Plan \| North American Companies \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| North American Companies \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,501
Ending balance	2,555	2,501
Fair Value	2,501	2,501
Foreign Plan \| North American Companies \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| U.K. Government Gilt Index
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	113,855
Ending balance	112,298	113,855
Fair Value	113,855	113,855
Foreign Plan \| U.K. Government Gilt Index \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| U.K. Government Gilt Index \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	113,855
Ending balance	112,298	113,855
Fair Value	113,855	113,855
Foreign Plan \| U.K. Government Gilt Index \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Liability Driven Investment
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	20,011
Ending balance	34,543	20,011
Fair Value	20,011	20,011
Foreign Plan \| Liability Driven Investment \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Liability Driven Investment \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	20,011
Ending balance	34,543	20,011
Fair Value	20,011	20,011
Foreign Plan \| Liability Driven Investment \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Multi-Asset Category
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	48,964
Ending balance	57,205	48,964
Fair Value	48,964	48,964
Foreign Plan \| Multi-Asset Category \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Multi-Asset Category \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	48,964
Ending balance	57,205	48,964
Fair Value	48,964	48,964
Foreign Plan \| Multi-Asset Category \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Buy-in Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	54,544
Ending balance	59,249	54,544
Fair Value	54,544	54,544
Foreign Plan \| Buy-in Contracts \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Buy-in Contracts \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Buy-in Contracts \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Ending balance	59,249
Fair Value	59,249
Foreign Plan \| Other types
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	15,247
Ending balance	16,703	15,247
Fair Value	15,247	15,247
Foreign Plan \| Other types \| Hierarchial Level 1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Other types \| Hierarchial Level 2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	0
Ending balance	0	0
Fair Value	0	0
Foreign Plan \| Other types \| Hierarchial Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	15,247
Ending balance	16,703	15,247
Fair Value	15,247	15,247
Netherlands \| Buy-in Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	25,900
Ending balance	27,400	25,900
Fair Value	27,400	25,900
United Kingdom \| Buy-in Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	28,600
Ending balance	31,800	28,600
Fair Value	$ 31,800	$ 28,600

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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- Definition

Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

+ References

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- Definition

Amount of contributions received by defined benefit plan from participant which increases plan assets.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

+ References

+ Details

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- Definition

Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

+ References

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- Definition

Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.

+ References

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