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COMMITMENTS AND CONTINGENCIES: (Tables) | 3 Months Ended
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Mar. 31, 2014
COMMITMENTS AND CONTINGENCIES: |
Schedule of environmental capital expenditures | Environmental capital expenditures in the three months ended March 31, 2014 and 2013 were as follows (in millions):
|  | 2014 |  | 2013 |
Peruvian operations |  | $ | 9.8 |  | $ | 1.8 |
Mexican operations |  | 6.4 |  | 10.5 |
|  | $ | 16.2 |  | $ | 12.3 |

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