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GOLD AND SILVER BULLION (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
GOLD AND SILVER BULLION      
Total cost $ 1,690,000 $ 22,810,000 $ 4,569,000
Changes in the Company's holdings of gold and silver      
Opening Balance 22,810,000 4,569,000  
Purchases   31,299,000 1,810,000
Proceeds from sale (23,836,000) (11,739,000)  
Gain on sale 3,075,000 2,075,000  
Unrealized loss (359,000) (3,394,000)  
Ending Balance 1,690,000 22,810,000 4,569,000
Gold
      
GOLD AND SILVER BULLION      
# of ounces 793,000 5,656  
Average cost per ounce (in dollars per ounce) 1,278.63 1,278.63  
Total cost 1,014,000 7,232,000  
Fair value per ounce (in dollars per ounce) 1,657.50 1,574.50  
Total fair value 1,314,000 8,905,000  
Quantity sold (in ounces) 4,863    
Cost of investments sold 6,200,000    
Changes in the Company's holdings of gold and silver      
Opening Balance 7,232,000 4,569,000  
Purchases   7,387,000  
Proceeds from sale (7,982,000) (6,218,000)  
Gain on sale 1,764,000 1,494,000  
Ending Balance 1,014,000 7,232,000  
Silver
      
GOLD AND SILVER BULLION      
# of ounces 24,969,000 552,812  
Average cost per ounce (in dollars per ounce) 27.08 28.18  
Total cost 676,000 15,578,000  
Fair value per ounce (in dollars per ounce) 29.95 28.18  
Total fair value 748,000 15,578,000  
Quantity sold (in ounces) 527,843    
Cost of investments sold 14,500,000    
Changes in the Company's holdings of gold and silver      
Opening Balance 15,578,000    
Purchases   23,912,000  
Proceeds from sale (15,854,000) (5,521,000)  
Gain on sale 1,311,000 581,000  
Unrealized loss (359,000) (3,394,000)  
Ending Balance $ 676,000 $ 15,578,000