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Income Taxes (Deferred Tax Liabilities And Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Income Tax Disclosure [Line Items] |  |  |
Deferred Tax Assets, Accrued maintenance liability | $ 6,782 | $ 4,877 |
Deferred Tax Assets, Deferred losses | 66,119 | 66,543 |
Deferred Tax Assets, Accrued expenses | 13,942 | 14,554 |
Deferred Tax Assets, Losses and credits forward | 805,881 | 715,841 |
Deferred Tax Liabilities, Depreciation/Impairment | (1,038,739) | (858,283) |
Deferred Tax Liabilities, Intangibles | (22,595) | (28,834) |
Deferred Tax Liabilities, Interest expense | (588) | (5,435) |
Deferred Tax Liabilities, Obligations under capital leases and debt obligations | (3,151) | (3,411) |
Deferred Tax Liabilities, Investments | (12,641) | (10,155) |
Valuation allowance | (127,361) | (72,000) | $ (61,933)
Deferred Tax Liabilities, Other | (51,183) | (27,884) |
Net deferred income tax liabilities | (363,534) | (204,187) |
The Netherlands [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred Tax Assets, Depreciation/Impairment | 8,547 | 11,580 |
Deferred Tax Assets, Losses and credits forward | 26,759 | 13,915 |
Valuation allowance | (26,758) | (13,915) |
Deferred Tax Liabilities, Other | (4,399) | (2,936) |
Net deferred income tax assets | 4,149 | 8,644 |
Ireland [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred Tax Assets, Losses and credits forward | 666,214 | 630,302 |
Deferred Tax Liabilities, Depreciation/Impairment | (1,030,901) | (876,219) |
Deferred Tax Liabilities, Intangibles | (6,353) | (10,071) |
Deferred Tax Liabilities, Accrued maintenance liability | (6,028) | (7,003) |
Deferred Tax Liabilities, Obligations under capital leases and debt obligations | (3,151) | (3,411) |
Valuation allowance | (1,562) |  |
Deferred Tax Liabilities, Other | (46,133) | (20,647) |
Net deferred income tax liabilities | (427,914) | (287,049) |
United States Of America [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred Tax Assets, Depreciation/Impairment |  | 5,393 |
Deferred Tax Assets, Accrued maintenance liability | 12,810 | 11,880 |
Deferred Tax Assets, Deferred losses | 66,119 | 66,543 |
Deferred Tax Assets, Accrued expenses | 13,942 | 14,554 |
Deferred Tax Assets, Losses and credits forward | 92,215 | 32,342 |
Deferred Tax Assets, Other | 5,539 | 7,350 |
Deferred Tax Liabilities, Depreciation/Impairment | (16,322) |  |
Deferred Tax Liabilities, Intangibles | (16,242) | (18,763) |
Deferred Tax Liabilities, Interest expense | (588) | (5,435) |
Deferred Tax Liabilities, Investments | (12,641) | (10,155) |
Valuation allowance | (89,130) | (35,074) |
Net deferred income tax assets | 55,702 | 68,635 |
Other [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred Tax Assets, Depreciation/Impairment |  | 963 |
Deferred Tax Assets, Losses and credits forward | 20,693 | 39,282 |
Deferred Tax Liabilities, Depreciation/Impairment | (63) |  |
Valuation allowance | (9,911) | (23,011) |
Deferred Tax Liabilities, Other | (6,190) | (11,651) |
Net deferred income tax assets | $ 4,529 | $ 5,583 |

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