Deferred income tax - Consolidated statement of financial position (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax
Deferred income tax asset, net	$ 106,170	$ 164,351
Deferred income tax liability, net	(32,421)	(46,742)
Deferred tax liability (asset)	$ 73,749	$ 117,609	$ 35,531

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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