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Long-Term Debt - Narrative (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Feb. 23, 2015
Dec. 31, 2014
Feb. 22, 2015
Debt Instrument          
Write off of debt issuance costs $ 2,221,000us-gaap_WriteOffOfDeferredDebtIssuanceCost $ 0us-gaap_WriteOffOfDeferredDebtIssuanceCost      
Senior credit facility outstanding amount 175,000,000us-gaap_LineOfCredit     0us-gaap_LineOfCredit  
Senior credit facility          
Debt Instrument          
Covenant ratio of secured debt To EBITDA, maximum 2.25sd_DebtInstrumentRestrictiveCovenantsRatioofSecuredDebtToEBITDAMeasuredQuarterly
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Mar 2015 2.00sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodOne
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Jun 2015 2.00sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Sep 2015 1.75sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodThree
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Dec 2015 1.50sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodFour
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Mar 2016 1.50sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodFive
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at June 2016 1.50sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodSix
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Sep 2016 1.50sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodSeven
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of EBITDA to interest expense at Dec 2016 2.00sd_DebtInstrumentRestrictiveCovenantsRatioOfEBITDAToInterestExpensePeriodEightAndThereafter
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Current assets to current liabilities, ratio minimum 1.00sd_CurrentRatioMinimum
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Jun 2016 6.25sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodOne
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Sep 2016 6.00sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Dec 2016 6.00sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodThree
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Mar 2017 5.50sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodFour
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Jun 2017 5.50sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodFive
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Sep 2017 5.00sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodSix
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Dec 2017 5.00sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodSeven
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Covenant, Ratio of total net debt to EBITDA at Mar 2018 4.50sd_DebtInstrumentRestrictiveCovenantsRatioOfTotalNetDebtToEBITDAPeriodEight
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Debt maturity date October 2019        
Line of credit facility, minimum collateral amount of proved oil, natural gas and NGL reserves representing the discounted present value of reserves used in borrowing base determination 80.00%sd_AmountOfProvedReservesPledgedAsCollateralPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Line of credit facility maximum borrowings capacity     900,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
  1,200,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
Write off of debt issuance costs     2,200,000us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Additional aggregate principal indebtedness permitted (less than)     500,000,000sd_LineofCreditFacilityMaximumAdditionalIndebtednessPermittedUndertheAmendedCreditAgreement
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Reduction in borrowing base for every $1 junior lien debt incurred     0.25sd_LineofCreditFacilityReductiontoMaximumBorrowingCapacityforEachDollarofAdditionalIndebtednessIncurred
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Senior credit facility outstanding amount 175,000,000us-gaap_LineOfCredit
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Line of credit facility, letters of credit outstanding 11,600,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
       
Senior credit facility | Minimum          
Debt Instrument          
Line of credit facility, unused capacity, commitment fee percentage 0.375%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Senior credit facility | Maximum          
Debt Instrument          
Line of credit facility, unused capacity, commitment fee percentage 0.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
       
Senior credit facility | LIBOR | Minimum          
Debt Instrument          
Line of credit facility, basis spread on variable rate 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
       
Senior credit facility | LIBOR | Maximum          
Debt Instrument          
Line of credit facility, basis spread on variable rate 2.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
       
Senior credit facility | Federal Funds Rate          
Debt Instrument          
Line of credit facility, basis spread on variable rate 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_FederalFundsEffectiveSwapRateMember
       
Senior credit facility | One-Month Eurodollar Rate          
Debt Instrument          
Line of credit facility, basis spread on variable rate 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= sd_OneMonthEurodollarRateMember
       
Senior credit facility | Base Rate | Minimum          
Debt Instrument          
Line of credit facility, basis spread on variable rate 0.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember
       
Senior credit facility | Base Rate | Maximum          
Debt Instrument          
Line of credit facility, basis spread on variable rate 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember
       
Senior Notes          
Debt Instrument          
Debt issuance cost $ 70,200,000sd_DebtIssuanceCostCumulative
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember