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Fair value measurement - Silver stream embedded derivative, continuity schedule (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Continuity schedule for embedded derivative
Balance, beginning of period	$ 270,191
Balance, end of period	1,350,735
Silver stream embedded derivative
Continuity schedule for embedded derivative
Balance, beginning of period	0	$ 0
Change in fair value	3,740
Balance, end of period	$ 3,740	$ 0

X

- Definition

The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

+ References

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X

- Definition

The gains (losses) including exchange differences recognised in profit or loss on the fair value measurement of assets. [Refer: At fair value [member]]

+ References

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- References

No definition available.

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