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STOCK BASED COMPENSATION (Details 2)
 12 Months Ended
Dec. 31, 2012
$0.00-$2.00
McEwen Mining
USD ($)
Dec. 31, 2012
$2.01-$4.00
McEwen Mining
USD ($)
Dec. 31, 2012
$4.01-$6.00
McEwen Mining
USD ($)
Dec. 31, 2012
$6.01-$8.31
McEwen Mining
USD ($)
Dec. 31, 2012
C$0.00-C$5.00
Nevada Pacific Gold Ltd.
CAD
Dec. 31, 2012
C$5.01-C$6.70
Nevada Pacific Gold Ltd.
CAD
Dec. 31, 2012
C$0.00-C$2.22
Minera Andes
CAD
Dec. 31, 2012
C$2.23-C$3.02
Minera Andes
CAD
Stock options outstanding and exercisable                
Range of Exercise Price, low end of range (in dollars per share) $ 0.00 $ 2.01 $ 4.01 $ 6.01 0.00 5.01 0.00 2.23
Range of Exercise Price, high end of range (in dollars per share) $ 2.00 $ 4.00 $ 6.00 $ 8.31 5.00 6.70 2.22 3.02
Options Outstanding                
Number Outstanding (in shares) 1,284,000 1,027,133 366,500 883,000 271,543 123,050 130,500 495,150
Weighted Average Exercise Price (in dollars per share) $ 1.03 $ 2.57 $ 5.66 $ 7.17 4.54 5.96 1.63 2.41
Weighted Average Remaining Contractual Life 5 years 11 months 12 days 5 years 9 months 18 days 8 years 2 months 26 days 7 years 11 months 5 days 3 years 3 months 4 days 2 years 4 days 1 year 2 months 5 days 2 years 14 days
Options Exercisable                
Number Exercisable (in shares) 1,284,000 823,800 66,500 328,331 271,543 123,050 130,500 347,101
Weighted Average Exercise Price (in dollars per share) $ 1.03 $ 2.59 $ 5.01 $ 7.29 4.54 5.96 1.63 2.46
Weighted Average Remaining Contractual Life 5 years 11 months 12 days 5 years 5 months 19 days 4 years 5 months 12 days 7 years 5 months 23 days 3 years 9 months 4 days 2 years 6 months 4 days 1 year 2 months 5 days 1 year 10 months 24 days