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Pensions and Other Postretirement Benefit Plans (Schedule of Pension Plans with Projected Benefit Obligation and Accumulated Benefit Obligation in Excess of Plan Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Plans with projected benefit obligation in excess of plan assets: |  |
Projected benefit obligation | $ 123,261 | $ 131,717
Fair value of plan assets | 86,547 | 90,149
Plans with accumulated benefit obligation in excess of plan assets: |  |
Accumulated benefit obligation | 120,869 | 129,698
Fair value of plan assets | $ 86,062 | $ 90,149

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- Definition Defined benefit plan, plans with benefit obligations in excess of plan assets, fair value plan assets. + References No definition available. + Details
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- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 + Details
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