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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Unrecognized tax benefits |  | $ 29,800 | $ 15,500 |  |  |
Net deferred income tax liabilities |  | 363,534 | 204,187 |  |  |
Deferred income tax assets |  | 215,445 | 161,193 |  |  |
Deferred income tax liabilities |  | 578,979 | 365,380 |  |  |
Valuation allowance on tax assets |  | $ 127,361 | $ 72,000 |  | $ 61,933 |
The Netherlands [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Corporate income tax rate | [1] | 25.00% | 25.00% | [2] | 25.00% | [2]
Valuation allowance on tax assets |  | $ 26,758 | $ 13,915 |  |  |
Carried back period |  | 1 year |  |  |  |
Carry forward period |  | 9 years |  |  |  |
Ireland [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Corporate income tax rate | [1] | 12.50% | 12.50% | [2] | 12.50% | [2]
Net deferred income tax liabilities |  | $ 427,914 | $ 287,049 |  |  |
Valuation allowance on tax assets |  | $ 1,562 |  |  |  |
United States Of America [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Corporate income tax rate | [1] | 36.30% | 36.30% | [2] | 38.30% | [2]
Valuation allowance on tax assets |  | $ 89,130 | $ 35,074 |  |  |
U.S. federal net operating losses |  | 234,700 |  |  |  |
Australia [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Valuation allowance on tax assets |  | $ 9,900 | $ 23,000 |  |  |
[1] | The local statutory income tax expense for our significant tax jurisdictions (Ireland, the Netherlands, the United States of America and Isle of Man) does not differ from the actual income tax expense.
[2] | Due to our migration from the Netherlands to Ireland as of February 1, 2016, we have updated the tax rate reconciliation for the years ended December 31, 2015 and 2014. The tax variance as a result of the global activities has been calculated as the difference between the local statutory tax rate in the relevant jurisdictions and the Irish statutory tax rate of 12.5%.

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