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SUBSEQUENT EVENTS (Details) - Subsequent Event - USD ($) $ / shares in Units, $ in Millions | Feb. 22, 2022 | Jan. 12, 2022
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Subsequent Event [Line Items] |  |
Common stock, dividends, per share, declared (in dollars per share) | $ 0.07 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Pitarrilla Project |  |
Subsequent Event [Line Items] |  |
Consideration in shares |  | $ 35.0
Consideration in cash |  | $ 35.0
Royalty fee, percentage on net smelter |  | 1.25%

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- Definition Disposal Group, Including Discontinued Operation, Consideration, Cash + References No definition available. + Details
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Namespace Prefix: | ssrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Disposal Group, Including Discontinued Operation, Consideration, Equity Interests + References No definition available. + Details
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Namespace Prefix: | ssrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Royalty Fee, Percentage on Net Smelter + References No definition available. + Details
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Namespace Prefix: | ssrm_
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Balance Type: | na
Period Type: | instant

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |