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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Mineral Properties, Plant and Equipment (Details)	Dec. 31, 2023
Vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated lives (in years)	5 years
Vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated lives (in years)	7 years
Mining equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated lives (in years)	3 years
Mobile equipment components | Minimum
Property, Plant and Equipment [Line Items]
Estimated lives (in years)	2 years
Mobile equipment components | Maximum
Property, Plant and Equipment [Line Items]
Estimated lives (in years)	7 years
ROU assets - plant and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated lives (in years)	10 years

X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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X

- Details

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- Details

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- Details

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X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ssrm_RightOutUseAssetPlantAndEquipmentMember
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Balance Type:
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