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Property, Plant and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Oil and natural gas properties    
Proved $ 12,020,208us-gaap_CapitalizedCostsProvedProperties [1] $ 11,707,147us-gaap_CapitalizedCostsProvedProperties [1]
Unproved 285,942us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative 290,596us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative
Total oil and natural gas properties 12,306,150us-gaap_OilAndGasPropertyFullCostMethodGross 11,997,743us-gaap_OilAndGasPropertyFullCostMethodGross
Less: accumulated depreciation, depletion and impairment (7,548,398)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities (6,359,149)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
Net oil and natural gas properties capitalized costs 4,757,752us-gaap_OilAndGasPropertyFullCostMethodNet 5,638,594us-gaap_OilAndGasPropertyFullCostMethodNet
Land 16,310us-gaap_Land 16,300us-gaap_Land
Non-oil and natural gas equipment 602,359us-gaap_MachineryAndEquipmentGross [2] 602,392us-gaap_MachineryAndEquipmentGross [2]
Buildings and structures 269,336us-gaap_BuildingsAndImprovementsGross [3] 263,191us-gaap_BuildingsAndImprovementsGross [3]
Total 888,005us-gaap_PropertyPlantAndEquipmentGross 881,883us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation and amortization (308,756)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (305,420)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Other property, plant and equipment, net 579,249us-gaap_PropertyPlantAndEquipmentNet 576,463us-gaap_PropertyPlantAndEquipmentNet
Total property, plant and equipment, net $ 5,337,001sd_TotalPropertyAndEquipmentNet $ 6,215,057sd_TotalPropertyAndEquipmentNet
[1] Includes cumulative capitalized interest of approximately $42.6 million and $38.1 million at March 31, 2015 and December 31, 2014, respectively.
[2] Includes cumulative capitalized interest of approximately $4.3 million at both March 31, 2015 and December 31, 2014.
[3] Includes cumulative capitalized interest of approximately $18.1 million and $17.1 million at March 31, 2015 and December 31, 2014, respectively.