Pensions and Other Postretirement Benefits (Reconciliation of The Benefit Obligation, Plan Assets and Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in plan assets:
Fair value of plan assets at beginning of year	$ 14,501
Fair value of plan assets at end of year	16,420	$ 14,501
Pension Plans
Change in benefit obligation:
Benefit obligation at beginning of year	23,922	28,617
Service cost (adjusted for actual employee contributions)	336	477	$ 513
Interest cost	620	686	674
Contributions by participants	0	21	35
Actuarial (gains) losses	2,170	(1,568)
Benefits paid	(856)	(1,042)
Curtailments and settlements	(25)	(3,362)
Plan amendments and other	573	1,107
Currency translation	531	(1,014)
Benefit obligation at end of year	27,271	23,922	28,617
Change in plan assets:
Fair value of plan assets at beginning of year	14,501	17,454
Actual return on plan assets	1,338	(343)
Company contributions	1,032	1,495
Contributions by participants		21
Benefits paid	(856)	(1,042)
Curtailments and settlements	(25)	(2,429)
Plan amendments and other		202
Currency translation	430	(857)
Fair value of plan assets at end of year	16,420	14,501	17,454
Funded status at end of year	(10,851)	(9,421)
OPEB Plans
Change in benefit obligation:
Benefit obligation at beginning of year	4,645	4,726
Service cost (adjusted for actual employee contributions)	126	108	96
Interest cost	180	152	142
Contributions by participants	0	0	0
Actuarial (gains) losses	(131)	(97)
Benefits paid	(187)	(244)
Curtailments and settlements	0	0
Plan amendments and other	0	0
Currency translation	0	0
Benefit obligation at end of year	4,633	4,645	4,726
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Company contributions	187	244
Contributions by participants	0	0
Benefits paid	(187)	(244)
Curtailments and settlements	0	0
Plan amendments and other	0	0
Currency translation	0	0
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	$ (4,633)	$ (4,645)

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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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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

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

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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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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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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.

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

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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.

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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.

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Defined Benefit Plan, Plan Assets, Amendment Plan

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