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Trade and Other Payables - Summary of Trade and Other Payables (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Trade and Other Payables [Line Items]
Other payables	$ 9,667	$ 1,017
Horizon Copper Corp [Member]
Trade and Other Payables [Line Items]
Other payables	$ 8,300

X

- Definition

Amounts payable that the entity does not separately disclose in the same statement or note.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_OtherPayables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	sand_TradeAndOtherPayablesLineItems
Namespace Prefix:	sand_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_SignificantInvestmentsInAssociatesAxis=sand_HorizonCopperCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: