COMMITMENTS AND CONTINGENCIES: - Labor matters (Details) $ in Millions		1 Months Ended	3 Months Ended			6 Months Ended	12 Months Ended
	Jun. 14, 2023	Feb. 28, 2025 USD ($)	Dec. 31, 2024 USD ($) item employee	Dec. 31, 2023 item	Mar. 31, 2023 item	Sep. 30, 2024 item	Dec. 31, 2024 item employee	Dec. 31, 2022 item	Dec. 31, 2021 item
Ilo and Cuajone
Labor matters
Number of labor unions				6	6
Peru | Labor Matters
Labor matters
Percentage of labor unionized			56.90%				56.90%
Total number of workers | employee							5,120
Number of labor unions						6	6
Number of labor unions represent majority of workers							0
Term of agreement			6 years
Extended term of agreement			6 years
Number of meetings with the unions to discuss different issues of collective interest			5			5
Number of labor unions of collective agreement signed			5				5	6	6
Total signing payments | $			$ 62.0
Peru | Labor Matters | Subsequent events
Labor matters
Extended term of agreement		3 years
Total signing payments | $		$ 6.3
Peru | Labor Matters | Minimum
Labor matters
Term of agreement								3 years	3 years
Peru | Labor Matters | Maximum
Labor matters
Total number of workers | employee			2,000
Term of agreement								6 years	6 years
Mexico
Labor matters
Threshold days to resume activities	15 days