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Equity Investments (Investments Accounted For By The Equity Method) (Details) (USD $)
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Dec. 31, 2011
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Dec. 31, 2010
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| Schedule of Equity Method Investments [Line Items] | ||
| Equity investments | $ 86,824,000 | $ 33,021,000 |
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Tatex Thailand II, LLC [Member]
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| Schedule of Equity Method Investments [Line Items] | ||
| Equity investments | 1,030,000 | 1,907,000 |
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Tatex Thailand III, LLC [Member]
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| Schedule of Equity Method Investments [Line Items] | ||
| Equity investments | 8,282,000 | 4,660,000 |
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Grizzly Oil Sands ULC [Member]
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| Schedule of Equity Method Investments [Line Items] | ||
| Equity investments | 69,008,000 | 26,454,000 |
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Bison Drilling And Field Services LLC [Member]
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| Schedule of Equity Method Investments [Line Items] | ||
| Equity investments | 6,366,000 | |
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Muskie Holdings LLC [Member]
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| Schedule of Equity Method Investments [Line Items] | ||
| Equity investments | $ 2,138,000 |
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- Definition
This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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