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Acquisitions and Divestitures - Additional Information (Detail) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 0 Months Ended | 3 Months Ended | 9 Months Ended | 0 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Apr. 17, 2012 Dynamic Acquisition | Sep. 30, 2012 Dynamic Acquisition | Sep. 30, 2013 Dynamic Acquisition | Sep. 30, 2012 Dynamic Acquisition | Jun. 20, 2012 Gulf of Mexico Properties acre | Jun. 30, 2012 Gulf of Mexico Properties | Sep. 30, 2013 Gulf of Mexico Properties | Sep. 30, 2013 Permian Properties | Sep. 30, 2013 Permian Properties Noncontrolling Interest | Sep. 30, 2013 Atinum MidCon I, LLC and Repsol E&P USA, Inc. | Sep. 30, 2012 Atinum MidCon I, LLC and Repsol E&P USA, Inc. | Jun. 30, 2012 Tertiary | Sep. 30, 2013 Mississippian Properties
Business Acquisitions and Dispositions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of acquired entity |  |  |  |  | $ 1,235,229,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration(2) |  |  |  |  | 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, bargain purchase gain impact |  |  |  |  |  |  |  |  | 1,800,000 |  |  |  |  |  |  |  |  |
Measurement period adjustments to the preliminary purchase price allocation, total adjustments |  |  |  |  |  |  |  | 0 | 4,800,000 |  |  | 4,800,000 |  |  |  |  |  |
Measurement period adjustments to the preliminary purchase price allocation, basic earnings per share impact |  |  |  |  |  |  |  |  | $ (0.01) |  |  |  |  |  |  |  |  |
Measurement period adjustments to the preliminary purchase price allocation, diluted earnings per share impact |  |  |  |  |  |  |  |  | $ (0.01) |  |  |  |  |  |  |  |  |
Measurement period adjustments to the preliminary purchase price allocation, deferred taxes and the valuation allowance impact |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  | 500,000 |  | 12,900,000 |  |  |  |  |  |  |  |  |
Fees to secure financing for acquisition |  |  |  |  |  |  |  |  | 10,900,000 |  |  |  |  |  |  |  |  |
Proceeds from sale of oil and natural gas properties |  |  |  | 0 |  |  |  |  |  |  |  |  | 2,600,000,000 |  |  |  | 130,800,000 |
Gain (loss) on sale of oil and gas property |  |  |  |  |  |  |  |  |  |  |  |  | (398,900,000) | (71,700,000) |  |  | 0 | 0
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 | 0 | 0 | 0 | (122,696,000) | (122,696,000) | [3] |  |  |  |  | 0 |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000,000
Drilling carry recorded as reduction of capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 334,200,000 | $ 243,100,000 |  |
[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. To validate the 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 Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6571-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6527-128477 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6396-128476 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6387-128476 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6393-128476 + Details
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