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OPERATING SEGMENTS - Disaggregation of Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | $ 1,426,927 | $ 1,148,033 | $ 1,474,199
Cost of sales | [1] | 804,147 | 607,942 | 671,374
Depreciation, depletion, and amortization |  | 214,012 | 181,447 | 227,959
Exploration, evaluation, and reclamation costs |  | 58,883 | 52,846 | 42,382
Care and maintenance |  | 0 | 41,800 | 0
Impairment charges |  | 411,398 | 0 | 20,275
Operating income (loss) |  | (130,244) | 190,268 | 444,375
Capital expenditures |  | 222,131 | 143,163 | 141,571
Assets |  | 5,385,773 | 5,254,657 | 5,211,438
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 1,426,927 | 1,148,033 | 1,474,199
Cost of sales |  | 804,147 | 607,942 | 671,374
Depreciation, depletion, and amortization |  | 214,012 | 181,447 | 227,959
Exploration, evaluation, and reclamation costs |  | 51,443 | 43,520 | 35,467
Care and maintenance |  |  | 41,800 |
Impairment charges |  | 405,745 |  | 0
Operating income (loss) |  | (54,652) | 269,921 | 531,757
Capital expenditures |  | 222,131 | 143,163 | 141,571
Assets |  | 4,486,442 | 4,863,225 | 4,471,243
Corporate and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 0 | 0 | 0
Cost of sales |  | 0 | 0 | 0
Depreciation, depletion, and amortization |  | 0 | 0 | 0
Exploration, evaluation, and reclamation costs |  | 7,440 | 9,326 | 6,915
Care and maintenance |  |  | 0 |
Impairment charges |  | 5,653 | 0 | 20,275
Operating income (loss) |  | (75,592) | (79,653) | (87,382)
Capital expenditures |  | 0 | 0 | 0
Assets |  | 899,331 | 391,432 | 740,195
Çöpler | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 442,417 | 355,070 | 607,887
Cost of sales |  | 268,628 | 189,825 | 264,889
Depreciation, depletion, and amortization |  | 93,808 | 76,628 | 125,220
Exploration, evaluation, and reclamation costs |  | 8,699 | 4,136 | 10,868
Care and maintenance |  |  | 41,800 |
Impairment charges |  | 353,322 | 0 | 0
Operating income (loss) |  | (287,519) | 39,556 | 201,302
Capital expenditures |  | 89,165 | 35,729 | 34,699
Assets |  | 2,915,262 | 3,298,757 | 3,099,240
Marigold | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 538,244 | 348,817 | 426,391
Cost of sales |  | 289,063 | 206,014 | 219,035
Depreciation, depletion, and amortization |  | 46,236 | 34,255 | 35,410
Exploration, evaluation, and reclamation costs |  | 15,059 | 18,182 | 10,968
Care and maintenance |  |  | 0 |
Impairment charges |  | 0 |  | 0
Operating income (loss) |  | 187,886 | 90,365 | 161,081
Capital expenditures |  | 82,252 | 58,795 | 55,861
Assets |  | 782,353 | 667,834 | 599,164
Seabee | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 164,346 | 244,692 | 213,860
Cost of sales |  | 82,898 | 74,679 | 66,354
Depreciation, depletion, and amortization |  | 40,533 | 49,445 | 45,334
Exploration, evaluation, and reclamation costs |  | 17,489 | 14,104 | 11,867
Care and maintenance |  |  | 0 |
Impairment charges |  | 49,786 | 0 | 0
Operating income (loss) |  | (26,867) | 106,453 | 90,332
Capital expenditures |  | 37,521 | 38,193 | 40,553
Assets |  | 464,033 | 581,574 | 479,370
Puna | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue |  | 281,920 | 199,454 | 226,061
Cost of sales |  | 163,558 | 137,424 | 121,096
Depreciation, depletion, and amortization |  | 33,435 | 21,119 | 21,995
Exploration, evaluation, and reclamation costs |  | 10,196 | 7,098 | 1,764
Care and maintenance |  |  | 0 |
Impairment charges |  | 2,637 | 0 | 0
Operating income (loss) |  | 71,848 | 33,547 | 79,042
Capital expenditures |  | 13,193 | 10,446 | 10,458
Assets |  | $ 324,794 | $ 315,060 | $ 293,469
[1] | Excludes depreciation, depletion, and amortization.

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

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- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ConsolidationItemsAxis=ssrm_CorporateAndReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ssrm_PlerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ssrm_MarigoldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ssrm_SeabeeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ssrm_PunaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |