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STOCKHOLDERS' EQUITY: (Tables) | 3 Months Ended
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Mar. 31, 2014
STOCKHOLDERS' EQUITY |
Schedule of activity in treasury stock | Activity in treasury stock in the three-month period ended March 31, 2014 and 2013 is as follows (in millions):
|  | 2014 |  | 2013 |
Southern Copper common shares |  |  |  |  |
Balance as of January 1, |  | $ | 1,011.0 |  | $ | 729.8 |
Purchase of shares |  | 52.5 |  | — |
Stock dividend |  | — |  | — |
Balance as of March 31, |  | 1,063.5 |  | 729.8 |
Parent Company (Grupo Mexico) common shares |  |  |  |  |
Balance as of January 1, |  | 205.6 |  | 189.0 |
Other activity, including dividend, interest and currency translation effect |  | 6.3 |  | 12.4 |
Balance as of March 31, |  | 211.9 |  | 201.4 |
Treasury stock balance as of March 31, |  | $ | 1,275.4 |  | $ | 931.2 |
Schedule of share repurchase program activity |
|  |  |  |  |  |  |  | Total Number of |  | Maximum Number of |  |  |
|  |  |  |  |  | Average |  | Shares Purchased as |  | Shares that May Yet |  |  |
Period |  | Total Number of |  | Price Paid |  | Part of Publicly |  | Be Purchased Under |  | Total Cost |
From |  | To |  | Shares Purchased |  | per Share |  | Announced Plan |  | the Plan @ $29.11 (*) |  | ($ in millions) |
2008: |  |  |  | 28,510,150 |  | $ | 13.49 |  | 28,510,150 |  |  |  | $ | 384.7 |
2009: |  |  |  | 4,912,000 |  | 14.64 |  | 33,422,150 |  |  |  | 71.9 |
2010: |  |  |  | 15,600 |  | 29.69 |  | 33,437,750 |  |  |  | 0.5 |
2011: |  |  |  | 9,034,400 |  | 30.29 |  | 42,472,150 |  |  |  | 273.7 |
2012: |  |  |  | 4,442,336 |  | 33.17 |  | 46,914,486 |  |  |  | 147.3 |
2013: |  |  |  | 10,245,000 |  | 27.47 |  | 57,159,486 |  |  |  | 281.4 |
2014: |  |  |  |  |  |  |  |  |  |  |  |  |
01/01/14 |  | 01/31/14 |  | 1,768,000 |  | 28.06 |  | 58,927,486 |  |  |  | 49.6 |
03/01/14 |  | 03/21/14 |  | 106,079 |  | 27.04 |  | 59,033,565 |  |  |  | 2.9 |
Total first quarter |  |  |  | 1,874,079 |  | 28.00 |  |  |  |  |  | 52.5 |
Total purchased |  |  |  | 59,033,565 |  | $ | 20.53 |  |  |  | 27,070,666 |  | $ | 1,212.0 |
(*) NYSE closing price of SCC common shares at March 31, 2014
Employee Stock Purchase Plan |
STOCKHOLDERS' EQUITY |
Schedule of stock based compensation expense and unrecognized compensation expense | The stock based compensation expense for the first quarter 2014 and 2013, under the Employee Stock Purchase Plan and the unrecognized compensation expense as of March 31, 2014 and 2013 under this plan were as follows (in millions):
|  | 2014 |  | 2013 |
Stock based compensation expense |  | $ | 0.5 |  | $ | 0.5 |
Unrecognized compensation expense |  | $ | 1.6 |  | $ | 3.7 |
Schedule of stock award activity |
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 2014 |  | 4,449,599 |  | $ | 1.16 |
Granted |  | — |  | — |
Exercised |  | (40,632 | ) | $ | 1.16 |
Forfeited |  | — |  | — |
Outstanding shares at March 31, 2014 |  | 4,408,967 |  | $ | 1.16 |
Outstanding shares at January 1, 2013 |  | 6,955,572 |  | $ | 1.16 |
Granted |  | — |  | — |
Exercised |  | (2,349,157 | ) | $ | 1.16 |
Forfeited |  | (29,639 | ) | $ | 1.16 |
Outstanding shares at March 31, 2013 |  | 4,576,776 |  | $ | 1.16 |
New Employee Stock Purchase Plan |
STOCKHOLDERS' EQUITY |
Schedule of stock based compensation expense and unrecognized compensation expense | The stock based compensation expense for the first quarter 2014 and 2013, under the New Employee Stock Purchase Plan and the unrecognized compensation expense as of March 31, 2014 and 2013 under this plan were as follows (in millions):
|  | 2014 |  | 2013 |
Stock based compensation expense |  | $ | 0.1 |  | $ | 0.1 |
Unrecognized compensation expense |  | $ | 2.5 |  | $ | 3.0 |
Schedule of stock award activity |
|  | Shares |  | Unit Weighted Average Grant Date Fair Value |
Outstanding shares at January 1, 2014 |  | 3,012,464 |  | $ | 2.05 |
Granted |  | — |  | — |
Exercised |  | (249,446 | ) | $ | 2.05 |
Forfeited |  | — |  | — |
Outstanding shares at March 31, 2014 |  | 2,763,018 |  | $ | 2.05 |
Outstanding shares at January 1, 2013 |  | 2,944,742 |  | $ | 2.05 |
Granted |  | — |  | — |
Exercised |  | — |  | — |
Forfeited |  | (22,638 | ) | $ | 2.05 |
Outstanding shares at March 31, 2013 |  | 2,922,104 |  | $ | 2.05 |

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