Pensions and Other Postretirement Benefits (Reconciliation of The Benefit Obligation, Plan Assets and Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in plan assets:
Fair value of plan assets at beginning of year	$ 17,454
Fair value of plan assets at end of year	14,501	$ 17,454
Pension Plans
Change in benefit obligation:
Benefit obligation at beginning of year	28,617	25,187
Service cost (adjusted for actual employee contributions)	477	513	$ 403
Interest cost	686	674	784
Contributions by participants	21	35	42
Actuarial (gains) losses	(1,568)	673
Benefits paid	(1,042)	(564)
Curtailments and settlements	(3,362)	0
Plan amendments and other	1,107
Currency translation	(1,014)	2,099
Benefit obligation at end of year	23,922	28,617	25,187
Change in plan assets:
Fair value of plan assets at beginning of year	17,454	14,553
Actual return on plan assets	(343)	957
Company contributions	1,495	1,013
Contributions by participants	21	35
Benefits paid	(1,042)	(564)
Curtailments and settlements	(2,429)	0
Plan amendments and other	202	0
Currency translation	(857)	1,460
Fair value of plan assets at end of year	14,501	17,454	14,553
Funded status at end of year	(9,421)	(11,163)
OPEB Plans
Change in benefit obligation:
Benefit obligation at beginning of year	4,726	3,833
Service cost (adjusted for actual employee contributions)	108	96	100
Interest cost	152	142	130
Contributions by participants	0	0	0
Actuarial (gains) losses	(97)	900
Benefits paid	(244)	(245)
Curtailments and settlements	0	0
Currency translation	0	0
Benefit obligation at end of year	4,645	4,726	3,833
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Company contributions	244	245
Contributions by participants	0	0
Benefits paid	(244)	(245)
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	$ (4,645)	$ (4,726)

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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