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Variable Interest Entities - Additional Information (Details) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Grey Ranch Plant, L.P
Dec. 31, 2011
Grey Ranch Plant, L.P
Dec. 31, 2012
Grey Ranch Plant Genpar, LLC (Genpar)
Apr. 30, 2011
SandRidge Mississippian Trust I
Dec. 31, 2012
SandRidge Mississippian Trust I
Dec. 31, 2011
SandRidge Mississippian Trust I
Apr. 30, 2011
SandRidge Permian Trust
Dec. 31, 2012
SandRidge Permian Trust
Dec. 31, 2011
SandRidge Permian Trust
Aug. 31, 2011
SandRidge Permian Trust
Apr. 30, 2012
SandRidge Mississippian Trust II
Dec. 31, 2012
SandRidge Mississippian Trust II
Dec. 31, 2012
Royalty Trusts
Dec. 31, 2011
Royalty Trusts
Dec. 31, 2012
Gas Gathering Agreement
Pinon Gathering and Compression Assets
Variable Interest Entity [Line Items]                                    
Beneficial interest owned by Company       50.00%   50.00% 38.40% [1] 26.90% 38.40%   30.50% 34.30% 34.30% [1] 39.90% [1] 39.90%      
Noncontrolling interest ownership percentage       50.00%                            
Noncontrolling interest, limited partnerships       $ 1,100,000 $ 8,200,000                          
Percentage ownership of another VIE           1.00%                        
Total liabilities 5,928,276,000 3,670,659,000   274,000 280,000 0                   1,101,000 486,000  
Royalty Trust IPO date, year and month             April 2011     August 2011       April 2012        
Percentage of subordinated units to total units                               25.00%    
Royalty Trust subordinated units distributions                               The subordinated units are entitled to receive pro rata distributions from the Royalty Trusts each quarter if and to the extent there is sufficient cash to provide a cash distribution on the common units that is no less than the applicable quarterly subordination threshold. If there is not sufficient cash to fund such a distribution on all common units, the distribution to be made with respect to the subordinated units will be reduced or eliminated for such quarter in order to make a distribution, to the extent possible, of up to the subordination threshold amount on all common units, including common units held by the Company.    
Royalty Trust incentive distributions                               In exchange for agreeing to subordinate a portion of its Royalty Trust units, SandRidge is entitled to receive incentive distributions equal to 50% of the amount by which the cash available for distribution on all of the Royalty Trust units exceeds the applicable quarterly incentive threshold.    
Percentage of cash available in excess of target distribution paid for incentive distribution                               50.00%    
Outstanding balance under loan commitment                               0 0  
Development period deadline under development agreement latest date               Dec. 31, 2015     Mar. 31, 2016       Dec. 31, 2016      
Maximum amount recoverable by trusts under the lien                               423,400,000    
Noncontrolling interest in VIEs                               1,500,000,000 914,700,000  
Proceeds from the sale of royalty trust units $ 139,360,000 $ 0 $ 0                         $ 139,360,000    
Gas gathering and operations and maintenance agreement end date                                   Jun. 30, 2029
[1] During the year ended December 31, 2012, the Company sold common units of the Mississippian Trust I and the Permian Trust it owned in transactions exempt from registration under Rule 144 under the Securities Act. These transactions decreased the Company’s beneficial interests in the Royalty Trusts. See further discussion of the unit sales below.