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SEGMENT AND RELATED INFORMATION: - Long Term Sales Contract (Details)	12 Months Ended
	Dec. 31, 2016 T
Copper cathodes | Mitsui
Long-term sales contract
Term of agreement	5 years
Quantity to be supplied related to additional annual contract in 2015 (in tons)	6,000
Quantity to be supplied related to additional annual contract from 2016 until 2019 (in tons)	48,000
Additional term in which contract may be renewed	5 years
Copper cathodes | Mitsui | Tia Maria
Long-term sales contract
Quantity to be supplied following the full startup of project (in tons)	24,000
Molybdenum concentrates | Molibdenos y Metales
Long-term sales contract
Quantity to be supplied (in tons)	29,380
Period for which contract can be extended	1 year
Minimum period for which contract is to be maintained	3 years
Molybdenum concentrates | Molymex
Long-term sales contract
Minimum percentage of total production required to be supplied	80.00%

X

- Definition

Represents the quantity of product agreed to be supplied under the additional annual contract following the full startup of the project.

+ References

No definition available.

+ Details

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- Definition

Represents the quantity of product agreed to be supplied under the additional annual contract from 2016 until 2019.

+ References

No definition available.

+ Details

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- Definition

Represents the quantity of product agreed to be supplied under the additional annual contract in 2015.

+ References

No definition available.

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- Definition

Represents the additional term for renewal of contract.

+ References

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- Definition

Represents the period for which long-term sales contract can be extended every year in December.

+ References

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+ Details

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- Definition

Represents the minimum period for which the contract is to be maintained unless either party to contract decides to terminate the agreement.

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No definition available.

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- Definition

Represents the minimum percentage of the entity's total production of goods that must be supplied within the specified time period of the agreement.

+ References

No definition available.

+ Details

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- Definition

Represents the quantity of product agreed to be supplied over a specified time period under the long-term sales contract.

+ References

No definition available.

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- Definition

Represents the term of the agreement entered into.

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No definition available.

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- Details

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