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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax Contingency [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate | 35.00% |  |  |
Unrecognized Tax Benefits | $ 24,361 | $ 31,534 | $ 36,935 | $ 44,701
Unrecognized Tax Benefits, Interest on Income Taxes Expense | (2,792) | (1,946) | (3,247) |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 3,301 | 6,881 |  |
Operating Loss Carryforwards |  | 11,940 |  |
Deferred Tax Liabilities, Undistributed Foreign Earnings | 3,200,000 |  |  |
Income Taxes Paid, Net | 231,183 | $ 190,109 | $ 182,668 |
International [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax Credit Carryforward, Amount | 327,568 |  |  |
Tax Credit Carryforward, Subject to Expiration | 9,787 |  |  |
Tax Credit Carryforward, No Expiration | 317,781 |  |  |
Tax Credit Carryforward, Deferred Tax Asset | 105,534 |  |  |
Other Tax Carryforward, Valuation Allowance | $ 6,624 |  |  |

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- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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