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Subsequent events (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 01, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of non-adjusting events after reporting period [line items]
Equity contributions by/acquisitions of non-controlling interests		$ 650
Waterfront Shipping Company Limited
Disclosure of non-adjusting events after reporting period [line items]
Equity contributions by/acquisitions of non-controlling interests	$ 145,000
Proportion of ownership interests held by non-controlling interests	40.00%
Proportion of ownership interest in subsidiary	60.00%	100.00%	100.00%

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The cash inflow from changes in ownership interests in subsidiaries that do not result in a loss of control. [Refer: Subsidiaries [member]]

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The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

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