The amount of outstanding funds that the entity is obligated to repay.

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

- Definition

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_BorrowingsInterestRateBasis
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The maturity of borrowings. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_BorrowingsMaturity
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Available credit facility.

+ References

No definition available.

+ Details

Name:	sand_AvailableCreditFacility
Namespace Prefix:	sand_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Borrowings maximum leverage ratio.

+ References

No definition available.

+ Details

Name:	sand_BorrowingsMaximumLeverageRatio
Namespace Prefix:	sand_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Borrowings minimum interest coverage ratio current period.

+ References

No definition available.

+ Details

Name:	sand_BorrowingsMinimumInterestCoverageRatioCurrentPeriod
Namespace Prefix:	sand_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Borrowings standby fee percentage.

+ References

No definition available.

+ Details

Name:	sand_BorrowingsStandbyFeePercentage
Namespace Prefix:	sand_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Deferred financing costs non current.

+ References

No definition available.

+ Details

Name:	sand_DeferredFinancingCostsNonCurrent
Namespace Prefix:	sand_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maximum borrowings available.

+ References

No definition available.

+ Details

Name:	sand_MaximumBorrowingsAvailable
Namespace Prefix:	sand_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Uncommitted accordion credit facility.

+ References

No definition available.

+ Details

Name:	sand_UncommittedAccordionCreditFacility
Namespace Prefix:	sand_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	ifrs-full_BorrowingsByNameAxis=sand_RevolvingFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FloatingInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=sand_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Revolving Facility and Deferred Financing Costs - Additional Information (Detail) $ in Millions		1 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended	25 Months Ended
	Dec. 31, 2022 USD ($)	Aug. 31, 2022 USD ($)	Jul. 31, 2022 USD ($)	Mar. 31, 2023	Sep. 30, 2023	Dec. 31, 2022 USD ($)	Oct. 31, 2025	Dec. 31, 2021 USD ($)
Disclosure of detailed information about borrowings [line items]
Uncommitted accordion credit facility		$ 125.0	$ 125.0
Revolving Facility [member]
Disclosure of detailed information about borrowings [line items]
Available credit facility			500.0
Borrowings, interest rate basis						SOFR
Maturity of credit facility		October 2025
Borrowings Maximum Leverage Ratio				4.75	4.25		4
Borrowings required interest coverage ratio	3
Borrowings	$ 497.5					$ 497.5
Deferred financing costs	$ 3.9					$ 3.9		$ 2.6
Revolving Facility [member] \| Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Borrowings standby fee percentage	0.422%					0.422%
Revolving Facility [member] \| Bottom of range [member] \| Floating Interest Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, adjustment to interest rate basis	1.875%					1.875%
Revolving Facility [member] \| Top of range [member]
Disclosure of detailed information about borrowings [line items]
Borrowings standby fee percentage	0.788%					0.788%
Revolving Credit Facility [Member]
Disclosure of detailed information about borrowings [line items]
Maximum borrowings available		$ 625.0	$ 625.0
Revolving Credit Facility [Member] \| Top of range [member] \| Floating Interest Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings, adjustment to interest rate basis	3.50%					3.50%