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Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning balance | $ (184,189) | $ (158,844) | $ (107,767)
Other comprehensive income/(loss) before reclassifications | 44,363 | (23,163) | (53,013)
Pension/postretirement settlements and curtailments |  | 45 | 103
Pension/postretirement plan remeasurement | 2,037 | (4,394) | (622)
Interest expense related to swaps reclassified to the Statement of Income, net of tax | 924 | 1,488 | 1,233
Pension and postretirement liability adjustments reclassified to Statement of Income, net of tax | 964 | 679 | 1,222
Net current period other comprehensive income | 48,288 | (25,345) | (51,077)
Ending balance | (135,901) | (184,189) | (158,844)
Translation Adjustments [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning balance | (133,298) | (108,655) | (55,240)
Other comprehensive income/(loss) before reclassifications | 45,980 | (24,643) | (53,415)
Pension/postretirement settlements and curtailments |  |  |
Pension/Postretirement plan change in benefits |  |  |
Pension/postretirement plan remeasurement |  |  |
Interest expense related to swaps reclassified to the Statement of Income, net of tax |  |  |
Net current period other comprehensive income | 45,980 | (24,643) | (53,415)
Ending balance | (87,318) | (133,298) | (108,655)
Pension and Postretirement Liability Adjustments [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning balance | (51,719) | (48,725) | (51,666)
Other comprehensive income/(loss) before reclassifications | (1,818) | 676 | 2,238
Pension/postretirement settlements and curtailments | 2,037 | 45 | 103
Pension/postretirement plan remeasurement |  | (4,394) | (622)
Interest expense related to swaps reclassified to the Statement of Income, net of tax |  |  |
Pension and postretirement liability adjustments reclassified to Statement of Income, net of tax | 964 | 679 | 1,222
Net current period other comprehensive income | 1,183 | (2,994) | 2,941
Ending balance | (50,536) | (51,719) | (48,725)
Derivative Valuation Adjustment [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning balance | 828 | (1,464) | (861)
Other comprehensive income/(loss) before reclassifications | 201 | 804 | (1,836)
Pension/postretirement settlements and curtailments |  |  |
Pension/postretirement plan remeasurement |  |  |
Interest expense related to swaps reclassified to the Statement of Income, net of tax | 924 | 1,488 | 1,233
Pension and postretirement liability adjustments reclassified to Statement of Income, net of tax |  |  |
Net current period other comprehensive income | 1,125 | 2,292 | (603)
Ending balance | $ 1,953 | $ 828 | $ (1,464)

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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