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Subsequent Events	6 Months Ended
	Jun. 30, 2011
Subsequent Events
Subsequent Events	19.           Subsequent Event On July 14, 2011, Midas Gold successfully completed an initial public offering (“IPO”), issuing 12,307,700 Midas Gold Shares for gross proceeds of Cdn$40,000 ($41,600 based on the exchange rate on July 14, 2011).  Midas Gold Shares began trading on the TSX under the symbol “MAX”.  Vista owns 31,802,615 Midas Gold Shares, which following the completion of Midas Gold's IPO, represents 30.7% of the issued and outstanding Midas Gold Shares.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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