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Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | May 01, 2018
Income Taxes [Line Items] |  |  |  |
Transition tax on foreign earnings payable | $ 96,400 |  |  |
Foreign tax credit related to withholding taxes | 106,700 |  |  |
Change in state tax expense - remeasurement of deferred tax assets | 10,000 |  |  |
Transition tax, noncurrent liability | 81,000 |  |  |
Taxes Payable, Current | 4,800 |  |  |
Transition taxes paid | 10,600 |  |  |
Deferred Tax Liabilities, Financing Arrangements | $ 0 | $ 430,088 |  | $ 439,200
Federal statutory rate | 35.00% | 35.00% | 35.00% |
Federal income tax rate after enactment of Tax reform (Percentage) | 21.00% |  |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 0 | $ 186,800 | $ 0 |
Transition tax on foreign earnings, net of foreign tax credits | 162,353 |  |  |
Foreign Earnings Repatriated | 1,150,000 |  |  |
Effective Income Tax Rate Reconciliation, Tax Holiday, Amount | $ 16,900 | 12,300 | 21,300 |
Deferred Tax Asset for previously unrecognized excess tax benefits | 38300000 |  |  |
Transition tax on foreign earnings | $ 5,602 | $ (162,353) | $ 0 |
foreign withholding tax | 60,700 |  |  |
Alternative minimum tax credits | 6,900 |  |  |
Tax Credit Carryforward, Amount | $ 18,600 |  |  |
Impact of tax holiday on diluted earnings per share | $ 0.14 | $ 0.10 | $ 0.16 |
Tax credit carryforward expiration | 2018 through 2034 |  |  |
Discount rate |  |  |  | 8.42%
Liability for Uncertain Tax Positions, Noncurrent | $ 219,500 |  |  |
Change in state tax expense | 5,600 |  |  |
Federal [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Net operating loss carryforwards | 4,500 |  |  |
State [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Net operating loss carryforwards | 700,000 |  |  |
Federal research tax credits | 2,300 |  |  |
Foreign [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Net operating loss carryforwards | $ 18,100 |  |  |
Tax credit carryforward expiration | 2024 |  |  |
Federal And State [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating Loss Carryforwards, Date | 2019 through 2034 |  |  |

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