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Acquisitions and Divestitures - Additional Information (Details) (USD $)
 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Atinum MidCon I, LLC and Repsol E&P USA, Inc.
Dec. 31, 2011
Atinum MidCon I, LLC and Repsol E&P USA, Inc.
Dec. 31, 2012
Atinum MidCon I, LLC
Dec. 31, 2012
Repsol E&P USA, Inc.
Dec. 31, 2010
2010 Divestitures
Aug. 31, 2010
Cana Shale
Dec. 31, 2010
Avalon Shale and Bone Spring reservoirs
acre
Dec. 31, 2011
2011 Divestitures
Jul. 31, 2011
Assets of Wolfberry
Aug. 31, 2011
Assets of New Mexico
Nov. 30, 2011
East Texas
Jun. 30, 2012
Tertiary
Dec. 31, 2012
Mississippian Properties
Dec. 31, 2011
Mississippian Properties
Sep. 30, 2011
Mississippian Properties
Atinum MidCon I, LLC
acre
Dec. 31, 2012
Mississippian Properties
Atinum MidCon I, LLC
Jan. 31, 2012
Mississippian Properties
Repsol E&P USA, Inc.
Dec. 31, 2012
Mississippian Properties
Repsol E&P USA, Inc.
Jan. 31, 2012
Mississippian Properties
Repsol E&P USA, Inc.
Mississippian formation in western Kansas
acre
Jan. 31, 2012
Mississippian Properties
Repsol E&P USA, Inc.
Mississippian formation in northern Oklahoma and southern Kansas
acre
Jul. 16, 2010
Arena Acquisition
Dec. 31, 2011
Arena Acquisition
Dec. 31, 2010
Arena Acquisition
Apr. 17, 2012
Dynamic Acquisition
Dec. 31, 2012
Dynamic Acquisition
Dec. 31, 2012
Dynamic Acquisition
Dec. 31, 2012
Gulf of Mexico Properties
Jun. 20, 2012
Gulf of Mexico Properties
acre
Feb. 28, 2013
Permian Properties
Dec. 31, 2012
Permian Properties
Business Acquisitions and Dispositions [Line Items]                                                                
Percentage of equity interests acquired                                             100.00%     100.00%            
Shares of common stock issued in connection with acquisition for each outstanding share (in shares per share)                                             4.7771                  
Cash paid in connection with acquisition for each outstanding share (in dollars per share)                                             $ 4.50                  
Issuance of common stock in acquisition (in shares)                                             190,280,000     73,962,000 [1]            
Cash consideration                                             $ 177,900,000     $ 680,000,000 [1],[2]       $ 38,458,000    
Purchase price of acquired entity                                             1,400,000,000     1,235,229,000 [1]            
SandRidge common stock price (in dollars per share)                                             $ 6.55     $ 7.33 [1]            
Acquisition related costs                                               600,000 17,000,000     13,000,000 200,000      
Revenue of acquiree since acquisition date                                                 112,100,000     365,000,000 26,200,000      
Earnings of acquiree since acquisition date                                                 90,100,000     81,500,000        
Gain (loss) on divestiture             0     0       0 0 0                                
Proceeds from sale of oil and natural gas properties               109,400,000 102,100,000   151,600,000 199,000,000 225,400,000 130,800,000     250,000,000   250,000,000                       2,600,000,000  
Net acres of non-core assets sold                 40,000                                              
Measurement period adjustments to the preliminary purchase price allocation                                                     1,800,000          
Adjustments to deferred taxes and the valuation allowance as a result of measurement period adjustments to the preliminary purchase price allocation                                                     3,000,000          
Oil and natural gas properties acquired, gross (in acres)                                                           184,000    
Oil and natural gas properties acquired, net (in acres)                                                           103,000    
Earnings on oil and gas properties                                                         19,100,000      
Restricted deposit 255,000,000 0                                                           255,000,000
Cumulative proceeds from sale of working interest subject to drilling carry 559,500,000 [3]       287,000,000 [3] 272,500,000 [3]                 500,000,000                                  
Maximum amount acquirer will pay of SandRidge's drilling and completion costs                             1,000,000,000     250,000,000   750,000,000                        
Number of net acres sold                                 113,000       250,000 114,000                    
Acquirer's share of Company portion of drilling and completion costs to be paid by acquirer                                     200.00%                          
Expected term of drilling carry                                 3 years   3 years                          
Drilling carry recorded as reduction of capital expenditures     $ 367,600,000 $ 18,900,000                                                        
[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] Includes amounts related to the drilling carry.