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Income taxes - Summary of income tax expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Major components of tax expense (income) [abstract]
Current tax expense	$ 88,575	$ 56,350
Deferred tax recovery	(9,441)	(16,579)
Income tax expense	$ 79,134	$ 39,771

- Definition

The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

+ References + Details