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Income taxes (Foreign rate differential by tax jurisdiction) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Line Items]
Pre-tax income (loss)	$ (134,732)	$ 1,333,046	$ 1,158,620
Local statutory tax rate	12.50%	12.50%	12.50%
Tax variance as a result of global activities	$ (390)	$ 1,083	$ (803)
Permanent differences	(179,886)	7,596	(7,687)
Loss from continuing operations before income tax	(314,618)	1,340,642	1,150,933
Ireland
Income Tax Disclosure [Line Items]
Pre-tax income (loss)	$ (160,739)	$ 1,324,100	$ 1,163,574
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)	$ 101,339	$ (30,041)	$ (85)
Local statutory tax rate	21.00%	21.00%	22.00%
Variance to Irish statutory tax rate of 12.5%	8.50%	8.50%	9.50%
Tax variance as a result of global activities	$ 8,614	$ (2,553)	$ (8)
The Netherlands
Income Tax Disclosure [Line Items]
Pre-tax income (loss)	$ (45,954)	$ 30,656	$ 6,108
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	$ (5,744)	$ 3,832	$ 764
Other
Income Tax Disclosure [Line Items]
Pre-tax income (loss)	$ (29,378)	$ 8,331	$ (10,977)
Local statutory tax rate	23.60%	10.10%	26.70%
Variance to Irish statutory tax rate of 12.5%	11.10%	(2.40%)	14.20%
Tax variance as a result of global activities	$ (3,260)	$ (196)	$ (1,559)

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Income (loss) from continuing operations before equity method investments, income taxes, extraordinary items, noncontrolling interest, non taxable income

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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