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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Gold and silver bullion, market value (in dollars) $ 21,397 $ 24,483
Common stock, shares authorized 500,000 500,000
Common, shares issued 161,839 136,572
Common, shares outstanding 161,839 136,572
Exchangeable Series B
    
Exchangeable, shares issued 103,523 0
Exchangeable, shares outstanding 103,523 0
Exchangeable Series A
    
Exchangeable, shares issued 2,528 3,181
Exchangeable, shares outstanding 2,528 3,181