CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data | Sep. 30, 2011 | Dec. 31, 2010 |
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| CONDENSED CONSOLIDATED BALANCE SHEETS | ||
| Property, plant, and equipment, accumulated depreciation (in dollars) | $ 89,790 | $ 66,615 |
| Mineral properties and development costs, accumulated depletion (in dollars) | $ 9,435 | $ 8,431 |
| Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 100,000,000 | 100,000,000 |
| Common stock, shares outstanding | 75,203,644 | 75,110,875 |
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- Definition The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The accumulated decrease in the carrying value of the mineral properties as a result of mine or mineral production.
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- Details
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