COMMITMENTS AND CONTINGENCIES - Reclamation obligations (Details) - Reclamation Bonds $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2024 CAD ($)	Dec. 31, 2023 USD ($)
Reclamation Bonds
Percentage of annual fees on surety bonds	2.40%	2.40%
Percentage of required deposit on value of surety bonds	7.20%	7.20%
Restricted cash	$ 3.8		$ 4.5
Tonkin and Gold Bar Properties
Reclamation Bonds
Reclamation bonding obligation	34.0
Timmins
Reclamation Bonds
Restricted cash	0.1
Black Fox Complex
Reclamation Bonds
Reclamation bonding obligation	$ 10.8	$ 15.6