XML 20 R54.htm IDEA: XBRL DOCUMENT v2.4.0.6
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE (Details 3) (USD $)
 12 Months Ended 3 Months Ended 11 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2012
MSC
Jun. 30, 2012
MSC
Mar. 31, 2012
MSC
Dec. 31, 2012
MSC
Dec. 31, 2012
MSC
Jan. 24, 2012
MSC
Dec. 31, 2012
MSC
Dividend Declared
Dec. 31, 2012
MSC
Minera Andes
Summary of MSC's financial information from operations                    
Sales percentage           100.00%        
Sales           $ 290,848,000        
Net income percentage           100.00%        
Net income     (2,654,000) (20,364,000) (17,351,000) 51,634,000        
Ownership interest (as a percent)           49.00% 49.00% 49.00%    
Net income on investment in MSC           25,301,000        
Amortization of fair value increments     (1,668,000) (916,000) (953,000) (4,466,000)        
Income on investment in MSC, net of amortization 20,835,000         20,835,000 20,835,000      
Current assets 91,918,000 47,883,000       136,900,000 136,900,000      
Total assets 1,150,937,000 310,355,000       814,400,000 814,400,000      
Current liabilities 25,195,000 6,124,000       66,400,000 66,400,000      
Total liabilities 261,346,000 91,051,000       261,700,000 261,700,000      
Dividend received             $ 19,200,000   $ 9,800,000 $ 9,400,000