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Reclamation Obligation - Disclosure Of Detailed Information About Reclamation Obligation (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Schedule Of Detailed Information About Reclamation Obligation [Line Items] |  |
Beginning Balance | $ 23,942 | $ 5,422
Assumed with acquisition |  | 17,675
Accretion | 719 | 383
Disposals |  | (364)
Change in estimates | 5,673 | 1,532
Foreign exchange translation | (105) | (706)
Ending Balance | 30,229 | 23,942
Current portion | (344) |
Non-current portion | 29,885 | 23,546
Mesquite [Member] |  |
Schedule Of Detailed Information About Reclamation Obligation [Line Items] |  |
Beginning Balance | 19,457 |
Assumed with acquisition |  | 17,675
Accretion | 385 | 92
Change in estimates | 1,579 | 1,690
Ending Balance | 21,421 | 19,457
Current portion | (344) |
Non-current portion | 21,077 |
Aurizona [Member] |  |
Schedule Of Detailed Information About Reclamation Obligation [Line Items] |  |
Beginning Balance | 4,079 | 4,735
Accretion | 334 | 275
Change in estimates | 3,586 | (225)
Foreign exchange translation | (105) | (706)
Ending Balance | 7,894 | 4,079
Non-current portion | 7,894 |
CastleMtn [Member] |  |
Schedule Of Detailed Information About Reclamation Obligation [Line Items] |  |
Beginning Balance | 406 | 339
Change in estimates | 508 | 67
Ending Balance | 914 | 406
Non-current portion | $ 914 |
Koricancha [Member] |  |
Schedule Of Detailed Information About Reclamation Obligation [Line Items] |  |
Beginning Balance |  | 348
Accretion |  | 16
Disposals |  | $ (364)

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- Definition Reclamation Obligation Accretion. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Reclamation obligation assumed with acquisition. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Reclamation obligation changes in estimates. + References No definition available. + Details
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- Definition Reclamation obligation currency translation adjustments. + References No definition available. + Details
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- Definition Reclamation obligation disposals. + References No definition available. + Details
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Namespace Prefix: | eqx_
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- Definition Reclamation obligations. + References No definition available. + Details
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- Definition Reclamation obligations current. + References No definition available. + Details
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Namespace Prefix: | eqx_
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Period Type: | instant

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- Definition Reclamation obligations noncurrent. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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