Earnings per share (Details) - USD ($) $ / shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings per share
(Loss)/profit for the purpose of basic earnings per share being net profit attributable to owners of the company	$ 5,102	$ 13,539	$ (5,359)	$ 166,495	$ (29,137)
Weighted average number of ordinary shares for the purposes of basic earnings per share	1	1	1	1	1
(Loss)/profit for the purpose of diluted earnings per share	$ 5,102	$ 13,539	$ (5,359)	$ 166,495	$ (29,137)
Weighted average number of ordinary shares for the purposes of diluted earnings per share	1	1	1	1	1
Basic, Earnings per share	$ 5,102	$ 13,539	$ (5,359)	$ 166,495	$ (29,137)
Diluted, Earnings per share	$ 5,102	$ 13,539	$ (5,359)	$ 166,495	$ (29,137)

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]

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The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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