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Business Segment Information - Summarized Financial Information Concerning Segments (Parenthetical) (Details) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Exploration and Production | Jun. 30, 2013 Drilling Assets | Dec. 31, 2013 Drilling Assets | Dec. 31, 2013 Drilling Assets Drilling and Oil Field Services | Dec. 31, 2013 Gas Treating Plants and other Midstream Assets | Jun. 30, 2013 Gas Treating Plants and other Midstream Assets | Dec. 31, 2013 Gas Treating Plants and other Midstream Assets | Dec. 31, 2013 Gas Treating Plants and other Midstream Assets Midstream Services | Dec. 31, 2012 Gas Treating Plants Midstream Services | Jun. 30, 2013 Corporate Asset | Dec. 31, 2013 Corporate Asset All Other | Dec. 31, 2013 CO2 Compression Facilities All Other | Dec. 31, 2012 CO2 Compression Facilities All Other
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment loss | $ 235,400,000 |  | $ 235,400,000 |  | $ 235,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  | $ 26,280,000 | $ 316,004,000 | $ 2,825,000 |  | $ 10,600,000 | $ 11,100,000 | $ 11,100,000 | $ 10,000,000 | $ 2,100,000 | $ 12,200,000 | $ 3,900,000 | $ 59,700,000 | $ 2,900,000 | $ 2,900,000 | $ 8,300,000 | $ 19,600,000

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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