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COMMITMENTS AND CONTINGENCIES: (Tables) | 9 Months Ended
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Sep. 30, 2013
COMMITMENTS AND CONTINGENCIES: |
Schedule of environmental capital expenditures | Environmental capital expenditures in the nine months ended September 30, 2013 and 2012 were as follows (in millions):
|  | 2013 |  | 2012 |
Peruvian operations |  | $ | 2.9 |  | $ | 3.0 |
Mexican operations |  | 30.3 |  | 13.8 |
|  | $ | 33.2 |  | $ | 16.8 |

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- Definition Tabular disclosure of environmental capital expenditures incurred during the period. + References No definition available. + Details
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