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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
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.