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Acquisitions and Divestitures - Additional Information (Detail) (USD $) Share data in Thousands, unless otherwise specified |  | 3 Months Ended | 1 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended |  | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2013 Atinum MidCon I, LLC and Repsol E&P USA, Inc. | Mar. 31, 2012 Atinum MidCon I, LLC and Repsol E&P USA, Inc. | Jun. 30, 2012 Tertiary | Mar. 31, 2013 Permian Properties | Mar. 31, 2013 Mississippian Properties | Apr. 17, 2012 Dynamic Acquisition | Mar. 31, 2013 Dynamic Acquisition | Mar. 31, 2012 Dynamic Acquisition | Jun. 30, 2012 Gulf of Mexico Properties | Mar. 31, 2013 Gulf of Mexico Properties | Jun. 20, 2012 Gulf of Mexico Properties acre | Mar. 31, 2013 Noncontrolling Interest Permian Properties
Business Acquisitions and Dispositions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Purchase price of acquired entity |  |  |  |  |  |  | $ 1,235,229,000 | [1] |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  | 680,000,000 | [1],[2] |  |  |  |  | 43,282,000 |
Issuance of common stock in acquisition, shares (in shares) |  |  |  |  |  |  | 73,962 | [1] |  |  |  |  |  |
Measurement period adjustments to the preliminary purchase price allocation |  |  |  |  |  |  |  |  | 0 |  |  | 4,800,000 |  |
Acquisition related costs |  |  |  |  |  |  |  |  |  | 2,500,000 |  |  |  |
Fees to secure financing for acquisition |  |  |  |  |  |  |  |  |  | 10,900,000 |  |  |  |
Proceeds from sale of oil and natural gas properties |  |  |  | 130,800,000 | 2,600,000,000 |  |  |  |  |  |  |  |  |
Gain (loss) on sale of oil and gas property |  |  |  | 0 | (399,100,000) | 0 |  |  |  |  |  |  |  | (71,700,000)
Oil and natural gas properties acquired, gross (in acres) |  |  |  |  |  |  |  |  |  |  |  |  | 184,000 |
Oil and natural gas properties acquired, net (in acres) |  |  |  |  |  |  |  |  |  |  |  |  | 103,000 |
Bargain purchase gain |  |  |  |  |  |  | (122,696,000) | [3] |  |  | 0 |  |  |
Cumulative proceeds from sale of working interest subject to drilling carry |  |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |
Maximum amount acquirer will pay of SandRidge's drilling and completion costs | 1,000,000,000 |  |  |  |  | 1,000,000,000 |  |  |  |  |  |  |  |
Drilling carry recorded as reduction of capital expenditures |  | 123,300,000 | 33,700,000 |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |
[1] | Consideration paid by the Company consisted of 74 million shares of SandRidge common stock and cash of approximately $680.0 million. The value of the stock consideration is based upon the closing price of $7.33 per share of SandRidge common stock on April 17, 2012, which was the closing date of the Dynamic Acquisition. Under the acquisition method of accounting, the purchase price is determined based on the total cash paid and the fair value of SandRidge common stock issued on the acquisition date.
[2] | Cash consideration paid, including amounts paid to retire Dynamic’s long-term debt, was funded through a portion of the net proceeds from the Company’s issuance of $750.0 million of unsecured 8.125% Senior Notes due 2022.
[3] | The bargain purchase gain results from the excess of the fair value of net assets acquired over consideration paid and, as additional information becomes available, is subject to adjustment. To validate the estimated bargain purchase gain on this acquisition, the Company reviewed its initial identification and valuation of assets acquired and liabilities assumed. The Company believes it was able to acquire Dynamic for less than the estimated fair value of its net assets due to their offshore location resulting in less bidding competition.

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- Definition Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -Clause 1 -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 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph l -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 34 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 43 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph d -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. + Details
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