SEGMENT AND RELATED INFORMATION: (Details 5)	12 Months Ended
	Dec. 31, 2013 T
Copper cathodes | Mitsui
Long-term sales contract
Quantity to be supplied (in tons)	48,000
Quantity to be supplied related to prior contract (period 1994-2000) (in tons)	90,000
Quantity to be supplied related to prior contract in 2014 (in tons)	48,000
Quantity to be supplied related to prior contract in 2015 (in tons)	42,000
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)	29,300
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	85.00%