Inventory and Other Current Assets	12 Months Ended
Dec. 31, 2012
Inventory and Other Current Assets [Abstract]
Inventory and Other Current Assets	(6) Inventory and Other Current Assets Inventory and other current assets includes approximately $136.5 million and $83.1 million of inventory as of December 31, 2012 and 2011, respectively. The Company’s inventory balance as of December 31, 2012 consisted of approximately $63.7 million of finished goods, $6.0 million of work-in-process, $5.0 million of raw materials and $61.8 million of supplies and consumables. The Company’s inventory balance as of December 31, 2011 consisted of approximately $39.0 million of finished goods, $2.3 million of work-in-process, $5.4 million of raw materials and $36.4 million of supplies and consumables. Inventory and other current assets also includes approximately $18.5 million and $133.4 million of costs incurred and estimated earnings in excess of billings on uncompleted contracts as of December 31, 2012 and 2011, respectively. The Company follows the percentage-of-completion method of accounting for applicable contracts. In December 2007, Wild Well entered into contractual arrangements pursuant to which it decommissioned seven downed oil and gas platforms and related well facilities located in the Gulf of Mexico for a fixed sum of $750 million. The contract contained certain covenants primarily related to Wild Well’s performance of the work. As of December 31, 2012, the work on this project was complete, and all amounts due the Company pursuant to this contract have been collected. As of December 31, 2011, there were approximately $129.7 million of costs and estimated earnings in excess of billings related to this contract included in other current assets. Additionally, available-for-sale securities are included in inventory and other current assets. 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 $51.6 million in shares of SandRidge stock (approximately 7.0 million shares valued at $7.33 per share) in consideration for its 10% interest in Dynamic Offshore (see note 7). In accordance with authoritative guidance related to equity securities, the Company is accounting for the shares received through this transaction as available-for-sale securities. The changes in fair values, net of applicable taxes, on available-for-sale securities are recorded as unrealized holding gains (losses) on securities as a component of accumulated other comprehensive loss in shareholders' equity. During the year ended December 31, 2012, the Company sold approximately 5.6 million shares of SandRidge stock for approximately $41.9 million, resulting in a realized gain of approximately $0.9 million. The fair value of the remaining 1.4 million shares as of December 31, 2012 was approximately $9.2 million. During the year ended December 31, 2012, the Company recorded an unrealized loss on these securities of approximately $1.4 million, of which approximately $0.9 million was reported within accumulated other comprehensive loss, net of tax benefit of approximately $0.5 million. The Company evaluates whether unrealized losses on investments in securities are other-than-temporary, and if it is believed the unrealized losses are other-than-temporary, an impairment charge is recorded. There were no other-than-temporary impairment losses recognized during the year ended December 31, 2012.

(6) Inventory and Other Current Assets

Inventory and other current assets includes approximately $136.5 million and $83.1 million of inventory as of December 31, 2012 and 2011, respectively. The Company’s inventory balance as of December 31, 2012 consisted of approximately $63.7 million of finished goods, $6.0 million of work-in-process, $5.0 million of raw materials and $61.8 million of supplies and consumables. The Company’s inventory balance as of December 31, 2011 consisted of approximately $39.0 million of finished goods, $2.3 million of work-in-process, $5.4 million of raw materials and $36.4 million of supplies and consumables.

Inventory and other current assets also includes approximately $18.5 million and $133.4 million of costs incurred and estimated earnings in excess of billings on uncompleted contracts as of December 31, 2012 and 2011, respectively. The Company follows the percentage-of-completion method of accounting for applicable contracts. In December 2007, Wild Well entered into contractual arrangements pursuant to which it decommissioned seven downed oil and gas platforms and related well facilities located in the Gulf of Mexico for a fixed sum of $750 million. The contract contained certain covenants primarily related to Wild Well’s performance of the work. As of December 31, 2012, the work on this project was complete, and all amounts due the Company pursuant to this contract have been collected. As of December 31, 2011, there were approximately $129.7 million of costs and estimated earnings in excess of billings related to this contract included in other current assets.

Additionally, available-for-sale securities are included in inventory and other current assets. 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 $51.6 million in shares of SandRidge stock (approximately 7.0 million shares valued at $7.33 per share) in consideration for its 10% interest in Dynamic Offshore (see note 7). In accordance with authoritative guidance related to equity securities, the Company is accounting for the shares received through this transaction as available-for-sale securities. The changes in fair values, net of applicable taxes, on available-for-sale securities are recorded as unrealized holding gains (losses) on securities as a component of accumulated other comprehensive loss in shareholders' equity. During the year ended December 31, 2012, the Company sold approximately 5.6 million shares of SandRidge stock for approximately $41.9 million, resulting in a realized gain of approximately $0.9 million.

The fair value of the remaining 1.4 million shares as of December 31, 2012 was approximately $9.2 million. During the year ended December 31, 2012, the Company recorded an unrealized loss on these securities of approximately $1.4 million, of which approximately $0.9 million was reported within accumulated other comprehensive loss, net of tax benefit of approximately $0.5 million. The Company evaluates whether unrealized losses on investments in securities are other-than-temporary, and if it is believed the unrealized losses are other-than-temporary, an impairment charge is recorded. There were no other-than-temporary impairment losses recognized during the year ended December 31, 2012.