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Shareholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period |  |  | $ (229,327) |
Total other comprehensive income (loss), net of tax | $ 15,466 | $ 8,528 | 51,584 | $ 5,913
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period | (177,743) |  | (177,743) |
Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period |  |  | (229,327) | (200,607)
OCI before reclassifications |  |  | 49,009 | 7,895
Amounts reclassified from AOCI |  |  | 2,575 | (1,982)
Total other comprehensive income (loss), net of tax |  |  | 51,584 | 5,913
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period | (177,743) | (194,694) | (177,743) | (194,694)
Accumulated Translation Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period |  |  | (182,986) | (158,009)
OCI before reclassifications |  |  | 49,304 | 12,317
Amounts reclassified from AOCI |  |  | 1,089 | (1,407)
Total other comprehensive income (loss), net of tax |  |  | 50,393 | 10,910
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period | (132,593) | (147,099) | (132,593) | (147,099)
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Derivative Instruments [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period |  |  | 43 | 318
OCI before reclassifications |  |  | (295) | (3,709)
Amounts reclassified from AOCI |  |  | 482 | 519
Total other comprehensive income (loss), net of tax |  |  | 187 | (3,190)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period | 230 | (2,872) | 230 | (2,872)
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period |  |  | (14,380) | (14,380)
OCI before reclassifications |  |  | 0 | 0
Amounts reclassified from AOCI |  |  | 0 | 0
Total other comprehensive income (loss), net of tax |  |  | 0 | 0
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period | (14,380) | (14,380) | (14,380) | (14,380)
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period |  |  | (32,004) | (28,536)
OCI before reclassifications |  |  | 0 | (713)
Amounts reclassified from AOCI |  |  | 1,004 | (1,094)
Total other comprehensive income (loss), net of tax |  |  | 1,004 | (1,807)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period | $ (31,000) | $ (30,343) | $ (31,000) | $ (30,343)

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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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