Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Income Taxes (Summary Of Income Tax Expense (Benefit) By Tax Jurisdiction) (Details)

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Income Taxes (Summary Of Income Tax Expense (Benefit) By Tax Jurisdiction) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) $ 161,340 $ 110,353 $ 115,859
Provision for income taxes 173,496 189,805 [1] 137,373 [1]
Ireland [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) 141,364 151,623 87,147
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets 1,562    
Current tax expense (benefit) 4,730 (99) 229
The Netherlands [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) (8,346) (7,453) 1,339
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets 12,843 13,915  
Current tax expense (benefit) 1,164 37,512 5,290
United States Of America [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) (41,163) (65,341) 26,267
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets 54,056 10,074  
Current tax expense (benefit) 3,166 39,358 15,553
Other [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) 14,124 22,130 (5,744)
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets (13,100) (13,922) 6,850
Current tax expense (benefit) 3,096 2,008 442
Deferred Tax Expense (Benefit) [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) 105,979 100,959 109,009
Deferred Tax Expense (Benefit) Related To An Increase (Decrease) In Changes In Valuation Allowance Of Deferred Tax Assets [Member]      
Income Tax Disclosure [Line Items]      
Deferred tax expense (benefit) related to an increase (decrease) in changes in valuation allowance of deferred tax assets 55,361 10,067 6,850
Current Tax Expense (Benefit) [Member]      
Income Tax Disclosure [Line Items]      
Current tax expense (benefit) $ 12,156 $ 78,779 $ 21,514
[1] Effective February 1, 2016, we moved our headquarters and executive officers from Amsterdam to Dublin, and as of February 1, 2016, we became tax resident in Ireland. Accordingly, we have updated the figures for the years ended December 31, 2015 and 2014 as compared to those previously reported in the financial statements contained in our 2015 annual report on Form 20-F to reflect the permanent differences being taxed at the Irish statutory rate of 12.5% rather than the Dutch statutory rate of 25%.