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Pensions and Other Postretirement Benefits (Projected and Accumulated Benefit Obligations) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Accumulated benefit obligation, all plans	$ 23,040	$ 26,907
Plans for which the accumulated benefit obligation exceeds plan assets:
Projected benefit obligation	22,552	27,317
Accumulated benefit obligation	22,155	26,074
Fair value of plan assets	$ 13,256	$ 16,274

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Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

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