NON-CONTROLLING INTERESTS (Details) $ / shares in Units, $ in Thousands, $ in Billions									12 Months Ended
	Oct. 20, 2023 USD ($) shares	Oct. 11, 2023 USD ($) shares	Oct. 11, 2023 ARS ($) shares	Mar. 15, 2023 USD ($) shares	Feb. 23, 2023 USD ($) shares	Feb. 23, 2023 ARS ($) shares	Aug. 31, 2022 USD ($) $ / shares shares	Jun. 21, 2022 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Oct. 10, 2023
Noncontrolling Interest
Non-controlling interests										$ 33,465
Deferred tax liability									$ 40,572	155
Issuance of equity by subsidiary (Note 20)										41,350	$ 40,000
Net loss attributed to non-controlling interests									(22,122)	(5,019)	(172)
Derecognition of cash on the date of deconsolidation									45,700
Derecognition of investments on the date of deconsolidation									44,200
Derecognition of mineral property interests and plant and equipment on the date of deconsolidation									171,900
Derecognition of accounts payable and accrued liabilities on the date of deconsolidation									7,900
McEwen Copper deconsolidation									86,800
Gain on Deconsolidation of McEwen Copper									222,157
McEwen Copper
Noncontrolling Interest
Initial carrying amount of the equity investment									383,968
Deferred tax liability									$ 37,800
Noncontrolling Interest
Noncontrolling Interest
Issuance of equity by subsidiary (Note 20)				$ 75,500						$ 23,707	$ 14,949
Common Shares and Additional Paid-in Capital
Noncontrolling Interest
Sale of flow-through shares (Note 13) (in shares) | shares									1,903,000	1,450,000	1,260,000
Issuance of equity by subsidiary (Note 20)									$ 109,900	$ 17,643	$ 25,051
McEwen Copper
Noncontrolling Interest
Percentage of ownership by company before private placement				68.10%
Percentage decrease of stock owned by parent of subsidiary's or equity investee				16.20%
Percentage of ownership by company after private placement				51.90%
McEwen
Noncontrolling Interest
Percentage of shares of the company owned												47.70%
Company's non-redeemable non-controlling interests (as a percent)												47.70%
McEwen | Nuton LLC
Noncontrolling Interest
Percentage of shares of the company owned												14.50%
McEwen | Stellantis
Noncontrolling Interest
Percentage of shares of the company owned												19.40%
Series B Private Placement Offering - Tranche One
Noncontrolling Interest
Percentage of ownership by company before private placement								81.40%
Series B Private Placement Offering - Tranche Two
Noncontrolling Interest
Non-controlling interests										7,600
Additional paid-in-capital										7,400
Percentage of ownership by company before private placement							76.09%
Percentage decrease of stock owned by parent of subsidiary's or equity investee								5.31%
Percentage of ownership by company after private placement								76.09%
Series B Private Placement Offering - Tranche Two | McEwen Copper
Noncontrolling Interest
Shares sold by the subsidiary | shares								1,500,000
Share price | $ / shares								$ 10.00
Gross proceeds from private placement offering								$ 15,000
Company's non-redeemable non-controlling interests (as a percent)								23.91%
Series B Private Placement Offering - Third and final Tranche
Noncontrolling Interest
Non-controlling interests										16,100
Additional paid-in-capital										$ 10,800
Percentage decrease of stock owned by parent of subsidiary's or equity investee							7.96%
Percentage of ownership by company after private placement							68.13%
Series B Private Placement Offering - Third and final Tranche | McEwen Copper
Noncontrolling Interest
Shares sold by the subsidiary | shares							2,685,000
Share price | $ / shares							$ 10.00
Gross proceeds from private placement offering							$ 26,900
Company's non-redeemable non-controlling interests (as a percent)							31.87%
Stellantis Private Placement | McEwen
Noncontrolling Interest
Sale of flow-through shares (Note 13) (in shares) | shares		1,900,000	1,900,000		2,850,000	2,850,000
Gross proceeds from private placement offering					$ 108,000	$ 20.9
Stellantis Secondary Transaction | McEwen
Noncontrolling Interest
Sale of flow-through shares (Note 13) (in shares) | shares					1,250,000	1,250,000
Gross proceeds from private placement offering		$ 119,600	$ 42.0		$ 47,400	$ 9.1
Nuton LOI | McEwen | Nuton LLC
Noncontrolling Interest
Sale of flow-through shares (Note 13) (in shares) | shares	152,615			350,000
Gross proceeds from private placement offering	$ 4,000			$ 6,600
Nuton Secondary LOI | McEwen | Nuton LLC
Noncontrolling Interest
Sale of flow-through shares (Note 13) (in shares) | shares	232,000			1,250,000
Gross proceeds from private placement offering	$ 6,000			$ 23,400