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Business and Significant Accounting Policy - Kinross Shares Sold (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Notes to Financial Statements        
Shares sold 150,000 20,000 180,000 125,000
Proceeds $ 1,238,000 $ 316,000 $ 1,591,000 $ 1,964,000
Gain on sale $ 1,132,000 $ 302,000 $ 1,464,000 $ 1,870,000