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Supplemental Information on Oil and Natural Gas Producing Activities - Results of Operations from Oil, Natural Gas and NGL Producing Activities (Unaudited) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Results of Operations, Oil and Gas Producing Activities Net Income (Excluding Corporate Overhead and Interest Costs) [Abstract]      
Revenues $ 1,820,278us-gaap_OilAndGasSalesRevenue $ 1,759,282us-gaap_OilAndGasSalesRevenue $ 1,226,794us-gaap_OilAndGasSalesRevenue
Expenses      
Production costs 548,719us-gaap_ResultsOfOperationsProductionOrLiftingCosts 524,364us-gaap_ResultsOfOperationsProductionOrLiftingCosts 368,946us-gaap_ResultsOfOperationsProductionOrLiftingCosts
Depreciation and depletion 567,732sd_ResultsOfOperationsDepreciationAndDepletion 568,029sd_ResultsOfOperationsDepreciationAndDepletion 317,246sd_ResultsOfOperationsDepreciationAndDepletion
Accretion of asset retirement obligations 36,777us-gaap_ResultsOfOperationsAccretionOfAssetRetirementObligations 28,996us-gaap_ResultsOfOperationsAccretionOfAssetRetirementObligations 9,368us-gaap_ResultsOfOperationsAccretionOfAssetRetirementObligations
Total expenses 1,153,228us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities 1,121,389us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities 695,560us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities
Income before income taxes 667,050us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes 637,893us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes 531,234us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes
Benefit of income taxes(1) (7,471)us-gaap_ResultsOfOperationsIncomeTaxExpense [1] (437,595)us-gaap_ResultsOfOperationsIncomeTaxExpense [1] (20,134)us-gaap_ResultsOfOperationsIncomeTaxExpense [1]
Results of operations for oil and natural gas producing activities (excluding corporate overhead and interest costs) $ 674,521us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts $ 1,075,488us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts $ 551,368us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts
[1] Reflects the Company’s effective tax rate, including the partial valuation allowance releases.