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Income taxes (Foreign rate differential by tax jurisdiction) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Line Items] |  |  |
Pre-tax income (loss) | $ 1,333,046 | $ 1,158,620 | $ 1,418,353
Local statutory tax rate | 12.50% | 12.50% | 12.50%
Tax variance as a result of global activities | $ 1,083 | $ (803) | $ (13,503)
Permanent differences | 7,596 | (7,687) | (182,481)
Income from continuing operations before income tax | 1,340,642 | 1,150,933 | 1,235,872
Ireland |  |  |
Income Tax Disclosure [Line Items] |  |  |
Pre-tax income (loss) | $ 1,324,100 | $ 1,163,574 | $ 1,212,029
Local statutory tax rate | 12.50% | 12.50% | 12.50%
Variance to Irish statutory tax rate of 12.5% | 0.00% | 0.00% | 0.00%
Tax variance as a result of global activities | $ 0 | $ 0 | $ 0
United States |  |  |
Income Tax Disclosure [Line Items] |  |  |
Pre-tax income (loss) | $ (30,041) | $ (85) | $ 72,390
Local statutory tax rate | 21.00% | 22.00% | 35.70%
Variance to Irish statutory tax rate of 12.5% | 8.50% | 9.50% | 23.20%
Tax variance as a result of global activities | $ (2,553) | $ (8) | $ 16,744
The Netherlands |  |  |
Income Tax Disclosure [Line Items] |  |  |
Pre-tax income (loss) | $ 30,656 | $ 6,108 | $ (61,086)
Local statutory tax rate | 25.00% | 25.00% | 25.00%
Variance to Irish statutory tax rate of 12.5% | 12.50% | 12.50% | 12.50%
Tax variance as a result of global activities | $ 3,832 | $ 764 | $ (7,636)
Isle of Man |  |  |
Income Tax Disclosure [Line Items] |  |  |
Pre-tax income (loss) |  |  | $ 185,882
Local statutory tax rate |  |  | 0.00%
Variance to Irish statutory tax rate of 12.5% |  |  | (12.50%)
Tax variance as a result of global activities |  |  | $ (23,235)
Other |  |  |
Income Tax Disclosure [Line Items] |  |  |
Pre-tax income (loss) | $ 8,331 | $ (10,977) | $ 9,138
Local statutory tax rate | 10.10% | 26.70% | 19.30%
Variance to Irish statutory tax rate of 12.5% | (2.40%) | 14.20% | 6.80%
Tax variance as a result of global activities | $ (196) | $ (1,559) | $ 624

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