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Income taxes (Narrative) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) company | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Income Tax Disclosure [Line Items] |  |  |
Net deferred income tax liabilities | $ 1,963,659 | $ 781,899 |
Deferred tax assets | 121,571 | 131,532 |
Deferred tax assets, gross | 273,700 |  |
Valuation allowance on tax assets | 152,077 | 79,393 | $ 74,361
Deferred tax liabilities | 2,085,230 | 913,431 |
Unrecognized tax benefits | $ 37,500 | $ 30,700 |
Local statutory tax rate | 12.50% | 12.50% | 12.50%
Number of significant group of U.S. companies that file a consolidated return | company | 1 |  |
Ireland |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net deferred income tax liabilities | $ 1,974,548 | $ 812,372 |
Valuation allowance on tax assets | $ 10,664 | $ 7,536 |
Local statutory tax rate | 12.50% | 12.50% | 12.50%
Operating loss carryforwards | $ 7,700 |  |
Ireland | No expiration date |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | 13,800,000 |  |
United States |  |  |
Income Tax Disclosure [Line Items] |  |  |
Valuation allowance on tax assets | $ 112,177 | $ 50,805 |
Local statutory tax rate | 21.00% | 21.00% | 21.00%
Federal and state income tax rate (in percentage) | 21.30% |  |
United States | Between 2035 and 2038 |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | $ 310,700 |  |
United States | No expiration date |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | $ 90,900 |  |

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