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Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% | 35.00%
Accumulated other comprehensive loss | $ 190,854 | $ 14,618 | $ 174,950 | $ 70,476
Pretax income (loss) | 5,698 | 43,305 |  |
Income tax effect | (3,654) | 1,111 |  |
Reclassification of unrealized loss (gain) | (18,935) | 8,747 |  |
Reclassification of deferred income taxes | 4,450 | (2,045) |  |
Other comprehensive income from unconsolidated subsidiaries | (3,463) | (605) |  |
Adoption of ASU 2018-02 (see Note 8) |  | 5,345 |  |
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss | 187,492 | 20,589 | 177,597 | 71,933
Pretax income (loss) | (9,895) | 48,435 |  |
Income tax effect | 0 | 50 |  |
Reclassification of unrealized loss (gain) | 0 | 0 |  |
Reclassification of deferred income taxes | 0 | 0 |  |
Other comprehensive income from unconsolidated subsidiaries | 0 | 0 |  |
Adoption of ASU 2018-02 (see Note 8) |  | 2,859 |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss | (11,637) | (17,278) | (14,374) | (11,538)
Pretax income (loss) | 15,593 | (4,501) |  |
Income tax effect | (3,654) | 1,053 |  |
Reclassification of unrealized loss (gain) | (19,188) | 8,747 |  |
Reclassification of deferred income taxes | 4,512 | (2,045) |  |
Other comprehensive income from unconsolidated subsidiaries | 0 | 0 |  |
Adoption of ASU 2018-02 (see Note 8) |  | 2,486 |  |
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss | 7,884 | 9,393 | 8,075 | 8,772
Pretax income (loss) | 0 | (629) |  |
Income tax effect | 0 | 8 |  |
Reclassification of unrealized loss (gain) | 253 | 0 |  |
Reclassification of deferred income taxes | (62) | 0 |  |
Other comprehensive income from unconsolidated subsidiaries | 0 | 0 |  |
Adoption of ASU 2018-02 (see Note 8) |  | 0 |  |
Accumulated Gain (Loss) from Unconsoldated Subsidiaries [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss | 7,115 | 1,914 | $ 3,652 | $ 1,309
Pretax income (loss) | 0 | 0 |  |
Income tax effect | 0 | 0 |  |
Reclassification of unrealized loss (gain) | 0 | 0 |  |
Reclassification of deferred income taxes | 0 | 0 |  |
Other comprehensive income from unconsolidated subsidiaries | (3,463) | (605) |  |
Adoption of ASU 2018-02 (see Note 8) |  | 0 |  |
Cross Currency Fx Forward Contract [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax | 4,000 | 1,000 |  |
Interest Rate Swap [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax |  | $ 2,000 |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax | $ 2,000 |  |  |

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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 Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 + Details
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