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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Gold and silver bullion, market value (in dollars) $ 2,273 $ 24,483
Common stock, shares authorized 500,000,000 500,000,000
Common, shares issued 189,610,000 136,572,000
Common, shares outstanding 189,610,000 136,572,000
Exchangeable Series B
    
Exchangeable, shares issued 78,886,000   
Exchangeable, shares outstanding 78,886,000   
Exchangeable Series A
    
Exchangeable, shares issued    3,181,000
Exchangeable, shares outstanding    3,181,000