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Pensions and Other Postretirement Benefits (Projected and Accumulated Benefit Obligations) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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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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- 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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