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Equity Investments (Tables) | 6 Months Ended
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Jun. 30, 2012
Equity Method Investments and Joint Ventures [Abstract] |
Investments Accounted For By The Equity Method | Investments accounted for by the equity method consist of the following as of June 30, 2012 and December 31, 2011:
| June 30, 2012 |  | December 31, 2011
Investment in Tatex Thailand II, LLC | $ | 829,000 |  |  | $ | 1,030,000 |
Investment in Tatex Thailand III, LLC | 8,840,000 |  |  | 8,282,000 |
Investment in Grizzly Oil Sands ULC | 144,810,000 |  |  | 69,008,000 |
Investment in Bison Drilling and Field Services LLC | 14,228,000 |  |  | 6,366,000 |
Investment in Muskie Holdings LLC | 4,310,000 |  |  | 2,138,000 |
Investment in Timber Wolf Terminals LLC | 977,000 |  |  | — |
Investment in Windsor Midstream LLC | 7,710,000 |  |  | — |
Investment in Stingray Pressure Pumping LLC | 3,940,000 |  |  | — |
Investment in Stingray Cementing LLC | 290,000 |  |  | — |
Investment in Blackhawk Midstream LLC | — |  |  | — |
| $ | 185,934,000 |  |  | $ | 86,824,000 |

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- Definition Tabular disclosure of equity method investments in common stock. The disclosure may include: (a) the name of each investee or group of investments for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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