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Property, Plant and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Oil and natural gas properties      
Proved $ 10,972,816us-gaap_CapitalizedCostsProvedProperties [1] $ 12,262,921us-gaap_CapitalizedCostsProvedProperties [1] $ 8,969,296us-gaap_CapitalizedCostsProvedProperties
Unproved 531,606us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative 865,863us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative 689,393us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative
Total oil and natural gas properties 11,504,422us-gaap_OilAndGasPropertyFullCostMethodGross 13,128,784us-gaap_OilAndGasPropertyFullCostMethodGross 9,658,689us-gaap_OilAndGasPropertyFullCostMethodGross
Less: accumulated depreciation, depletion and impairment (5,762,969)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities (5,231,182)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities (4,791,534)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
Net oil and natural gas properties capitalized costs 5,741,453us-gaap_OilAndGasPropertyFullCostMethodNet 7,897,602us-gaap_OilAndGasPropertyFullCostMethodNet 4,867,155us-gaap_OilAndGasPropertyFullCostMethodNet
Land 18,423us-gaap_Land 17,927us-gaap_Land  
Non-oil and natural gas equipment 600,603us-gaap_MachineryAndEquipmentGross [2] 643,370us-gaap_MachineryAndEquipmentGross [2]  
Buildings and structures 233,405us-gaap_BuildingsAndImprovementsGross [3] 205,349us-gaap_BuildingsAndImprovementsGross [3]  
Total 852,431us-gaap_PropertyPlantAndEquipmentGross 866,646us-gaap_PropertyPlantAndEquipmentGross  
Less accumulated depreciation and amortization (286,209)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (284,271)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment  
Other property, plant and equipment, net 566,222us-gaap_PropertyPlantAndEquipmentNet 582,375us-gaap_PropertyPlantAndEquipmentNet  
Total property, plant and equipment, net $ 6,307,675sd_TotalPropertyAndEquipmentNet $ 8,479,977sd_TotalPropertyAndEquipmentNet  
[1] Includes cumulative capitalized interest of approximately $23.4 million and $11.7 million at December 31, 2013 and 2012, respectively.
[2] Includes cumulative capitalized interest of approximately $4.3 million at both December 31, 2013 and 2012.
[3] Includes cumulative capitalized interest of approximately $12.0 million and $7.1 million at December 31, 2013 and 2012, respectively.