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Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | $ 325,099 | $ 331,237 | $ 322,589
Additions | 50,928 | 70,722 | 94,264
Deductions | (54,896) | (58,663) | (27,874)
Translation | (57) | (18,197) | (57,742)
Balance at end of period | 321,074 | 325,099 | 331,237
Allowance for Doubtful Accounts [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 16,367 | 12,768 | 9,373
Additions | 6,386 | 5,367 | 6,656
Deductions | (1,244) | (1,647) | (2,615)
Translation | (42) | (121) | (646)
Balance at end of period | 21,467 | 16,367 | 12,768
Valuation Allowance of Deferred Tax Assets [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 290,620 | 297,891 | 301,012
Additions | 8,382 | 36,778 | 49,879
Deductions | (27,515) | (24,967) | (401)
Translation | 164 | (19,082) | (52,599)
Balance at end of period | 271,651 | 290,620 | 297,891
Provision For Contingencies [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | 18,112 | 20,578 | 12,204
Additions | 36,160 | 28,577 | 37,729
Deductions | (26,137) | (32,049) | (24,858)
Translation | (179) | 1,006 | (4,497)
Balance at end of period | 27,956 | 18,112 | 20,578
Legal Reserve Accrual [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Additions | 36,160 | 28,577 | 37,729
Legal Reserve Settlements [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Deductions | (25,427) | (20,554) | (23,415)
Legal Reserve Reclassifications [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Deductions | (710) | $ (11,495) | $ (1,443)
Accounts Receivable [Member] | Allowance for Doubtful Accounts [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at end of period | 19,791 |  |
Other Receivables [Member] | Allowance for Doubtful Accounts [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at end of period | $ 1,676 |  |

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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