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RECLAMATION AND REMEDIATION LIABILITIES - Reclamation and Remediation Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Asset Retirement Obligation [Line Items]
Reclamation accretion			$ 18,249	$ 7,243
Total reclamation and remediation costs	$ 7,135	$ 2,414	81,305	280,146
Total reclamation costs
Asset Retirement Obligation [Line Items]
Reclamation adjustments and other	0	0	9,419	11,229
Reclamation accretion	7,059	2,414	18,249	7,243
Total reclamation and remediation costs	7,059	2,414	27,668	18,472
Total remediation costs
Asset Retirement Obligation [Line Items]
Reclamation adjustments and other	76	0	53,637	261,674
Reclamation accretion			0	0
Total reclamation and remediation costs	$ 76	$ 0	$ 53,637	$ 261,674

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Asset Retirement Obligation, Adjustments And Other

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Asset Retirement Obligation, Costs

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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481879/410-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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