Equity-Method Investments	3 Months Ended
Mar. 31, 2012
Equity-Method Investments [Abstract]
Equity-Method Investments	(6) Equity-Method Investments Investments in entities that are not controlled by the Company, but where the Company has the ability to exercise influence over the operations, are accounted for using the equity-method. The Company’s share of the income or losses of these entities is reflected as earnings (losses) from equity-method investments on its condensed consolidated statements of operations. In March 2011, the Company contributed all of its equity interests in SPN Resources, LLC (SPN Resources) and DBH, LLC (DBH) to Dynamic Offshore, the majority owner of both SPN Resources and DBH, in exchange for a 10% interest in Dynamic Offshore. The Company’s equity interest in Dynamic Offshore is accounted for as an equity-method investment with a balance of approximately $67.8 million and $70.6 million at March 31, 2012 and December 31, 2011, respectively. The Company recorded losses from its equity-method investment in Dynamic Offshore of approximately $0.3 million and $1.1 million for three and one month periods, respectively, ended March 31, 2012 and 2011. The Company recorded earnings from its equity-method investment in SPN Resources of approximately $0.2 million and recorded earnings from its equity-method investment in DBH of approximately $0.9 million for the two months ended February 28, 2011. The Company also recorded revenue from SPN Resources of approximately $0.3 million and from DBH of approximately $0.9 million for the two months ended February 28, 2011. The Company, where possible and at competitive rates, provides its products and services to assist Dynamic Offshore in producing and developing its oil and gas properties. The Company had a receivable from Dynamic Offshore of approximately $12.3 million and $9.8 million at March 31, 2012 and December 31, 2011. The Company also recorded revenue from Dynamic Offshore of approximately $15.5 million and $2.2 million for the three and one month periods, respectively, ended March 31, 2012 and 2011. Additionally, the Company has a receivable from Dynamic Offshore of approximately $13.6 million and $14.0 million, respectively, as of March 31, 2012 and December 31, 2011 related to its share of oil and natural gas commodity sales and production handling arrangement fees. Subsequent Event On April 17, 2012, SandRidge Energy Inc. (NYSE: SD) (SandRidge) completed its acquisition of Dynamic Offshore, at which time the Company received approximately $34.1 million in cash and approximately 7.0 million shares of SandRidge stock in consideration for its 10% interest in Dynamic Offshore. The Company expects to record a gain in the second quarter of 2012 of approximately $19.0 million as a result of this transaction. In accordance with authoritative guidance related to equity securities, the Company will account for the shares received through this transaction as available-for-sale securities. The shares will be recorded at their fair market value and any unrealized gains or losses will be excluded from earnings and reported as a net amount within accumulated other comprehensive income (loss) within stockholders’ equity and would also be reflected in the consolidated statement of comprehensive income.

Equity-Method Investments

3 Months Ended

Mar. 31, 2012

Equity-Method Investments [Abstract]

(6) Equity-Method Investments

Investments in entities that are not controlled by the Company, but where the Company has the ability to exercise influence over the operations, are accounted for using the equity-method. The Company’s share of the income or losses of these entities is reflected as earnings (losses) from equity-method investments on its condensed consolidated statements of operations.

In March 2011, the Company contributed all of its equity interests in SPN Resources, LLC (SPN Resources) and DBH, LLC (DBH) to Dynamic Offshore, the majority owner of both SPN Resources and DBH, in exchange for a 10% interest in Dynamic Offshore. The Company’s equity interest in Dynamic Offshore is accounted for as an equity-method investment with a balance of approximately $67.8 million and $70.6 million at March 31, 2012 and December 31, 2011, respectively. The Company recorded losses from its equity-method investment in Dynamic Offshore of approximately $0.3 million and $1.1 million for three and one month periods, respectively, ended March 31, 2012 and 2011.

The Company recorded earnings from its equity-method investment in SPN Resources of approximately $0.2 million and recorded earnings from its equity-method investment in DBH of approximately $0.9 million for the two months ended February 28, 2011. The Company also recorded revenue from SPN Resources of approximately $0.3 million and from DBH of approximately $0.9 million for the two months ended February 28, 2011.

The Company, where possible and at competitive rates, provides its products and services to assist Dynamic Offshore in producing and developing its oil and gas properties. The Company had a receivable from Dynamic Offshore of approximately $12.3 million and $9.8 million at March 31, 2012 and December 31, 2011. The Company also recorded revenue from Dynamic Offshore of approximately $15.5 million and $2.2 million for the three and one month periods, respectively, ended March 31, 2012 and 2011. Additionally, the Company has a receivable from Dynamic Offshore of approximately $13.6 million and $14.0 million, respectively, as of March 31, 2012 and December 31, 2011 related to its share of oil and natural gas commodity sales and production handling arrangement fees.

Subsequent Event

On April 17, 2012, SandRidge Energy Inc. (NYSE: SD) (SandRidge) completed its acquisition of Dynamic Offshore, at which time the Company received approximately $34.1 million in cash and approximately 7.0 million shares of SandRidge stock in consideration for its 10% interest in Dynamic Offshore. The Company expects to record a gain in the second quarter of 2012 of approximately $19.0 million as a result of this transaction. In accordance with authoritative guidance related to equity securities, the Company will account for the shares received through this transaction as available-for-sale securities. The shares will be recorded at their fair market value and any unrealized gains or losses will be excluded from earnings and reported as a net amount within accumulated other comprehensive income (loss) within stockholders’ equity and would also be reflected in the consolidated statement of comprehensive income.

- Definition

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.

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