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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)
In Thousands, unless otherwise specified
Total
Convertible Perpetual Preferred Stock
Common Stock
Additional Paid-In Capital
Treasury Stock
Accumulated Deficit
Noncontrolling Interest
Beginning Balance at Dec. 31, 2010 $ 1,547,483us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 8us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
$ 398us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 4,528,912us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (3,547)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ (2,989,576)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 11,288us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Beginning Balance (in shares) at Dec. 31, 2010     406,360us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Beginning Balance (in shares) at Dec. 31, 2010   7,650us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Increase (Decrease) in Stockholders' Equity              
Issuance of units by royalty trusts 917,528sd_IssuanceOfRoyaltyTrustUnitsValue           917,528sd_IssuanceOfRoyaltyTrustUnitsValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Distributions to noncontrolling interest owners (60,200)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders           (60,200)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Issuance of convertible perpetual preferred stock, net (in shares)   0us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Issuance of convertible perpetual preferred stock, net   0us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Issuance of convertible perpetual preferred stock, net (231)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts     (231)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Issuance of common stock in acquisition 0us-gaap_StockIssuedDuringPeriodValueAcquisitions            
Purchase of treasury stock (10,834)us-gaap_TreasuryStockValueAcquiredCostMethod       (10,834)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Retirement of treasury stock 0us-gaap_TreasuryStockRetiredCostMethodAmount     (10,834)us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
10,834us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock purchase - retirement plans, net of distributions (in shares)     (405)sd_TreasuryStockNonqualifiedPlanShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock purchase—retirement plans, net of distributions 568sd_TreasuryStockNonqualifiedPlanValue     3,179sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(2,611)sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock-based compensation 47,778us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue     47,778us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Stock-based compensation excess tax benefit 53us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation     53us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Issuance of restricted stock awards, net of cancellations (in shares)     5,998us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of restricted stock awards, net of cancellations 0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures   1us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(1)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net (loss) income 162,388us-gaap_ProfitLoss         108,065us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
54,323us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Convertible perpetual preferred stock dividends (55,583)us-gaap_DividendsPreferredStock         (55,583)us-gaap_DividendsPreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Dec. 31, 2011 2,548,950us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 8us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
399us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
4,568,856us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(6,158)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
(2,937,094)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
922,939us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending Balance (in shares) at Dec. 31, 2011   7,650us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Ending Balance (in shares) at Dec. 31, 2011     411,953us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity              
Issuance of units by royalty trusts 587,086sd_IssuanceOfRoyaltyTrustUnitsValue           587,086sd_IssuanceOfRoyaltyTrustUnitsValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Sale of royalty trust units 139,360us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest     79,056us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    60,304us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Distributions to noncontrolling interest owners (181,727)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders           (181,727)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Issuance of common stock in acquisition (in shares)     73,962us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock in acquisition 542,138us-gaap_StockIssuedDuringPeriodValueAcquisitions   74us-gaap_StockIssuedDuringPeriodValueAcquisitions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
542,064us-gaap_StockIssuedDuringPeriodValueAcquisitions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Purchase of treasury stock (11,312)us-gaap_TreasuryStockValueAcquiredCostMethod       (11,312)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Retirement of treasury stock 0us-gaap_TreasuryStockRetiredCostMethodAmount     (11,312)us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
11,312us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock purchase - retirement plans, net of distributions (in shares)     (345)sd_TreasuryStockNonqualifiedPlanShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock purchase—retirement plans, net of distributions (298)sd_TreasuryStockNonqualifiedPlanValue     2,146sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(2,444)sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock-based compensation 47,228us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue     47,228us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Stock-based compensation excess tax benefit (16)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation     (16)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Issuance of restricted stock awards, net of cancellations (in shares)     4,789us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of restricted stock awards, net of cancellations 0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures   3us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(3)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net (loss) income 246,571us-gaap_ProfitLoss         141,571us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
105,000us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Convertible perpetual preferred stock dividends (55,525)us-gaap_DividendsPreferredStock         (55,525)us-gaap_DividendsPreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Dec. 31, 2012 3,862,455us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 8us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
476us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
5,228,019us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(8,602)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
(2,851,048)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
1,493,602us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending Balance (in shares) at Dec. 31, 2012   7,650us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Ending Balance (in shares) at Dec. 31, 2012 490,359us-gaap_CommonStockSharesOutstanding   490,359us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity              
Sale of royalty trust units 28,985us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest     7,289us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    21,696us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Distributions to noncontrolling interest owners (206,470)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders           (206,470)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Contributions from noncontrolling interest owners 1,579sd_NoncontrollingInterestIncreaseOther           1,579sd_NoncontrollingInterestIncreaseOther
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Issuance of common stock in acquisition 0us-gaap_StockIssuedDuringPeriodValueAcquisitions            
Purchase of treasury stock (30,126)us-gaap_TreasuryStockValueAcquiredCostMethod       (30,126)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Retirement of treasury stock 0us-gaap_TreasuryStockRetiredCostMethodAmount     (30,126)us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
30,126us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock purchase - retirement plans, net of distributions (in shares)     (99)sd_TreasuryStockNonqualifiedPlanShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock purchase—retirement plans, net of distributions (435)sd_TreasuryStockNonqualifiedPlanValue     (267)sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(168)sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock-based compensation 88,397us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue     88,397us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Stock-based compensation excess tax benefit (4)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation     (4)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Payment received on shareholder receivable 1,250sd_AdjustmentsToAdditionalPaidInCapitalShareholderReceivablePayments     1,250sd_AdjustmentsToAdditionalPaidInCapitalShareholderReceivablePayments
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Issuance of restricted stock awards, net of cancellations (in shares)     30us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of restricted stock awards, net of cancellations 0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures   7us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(7)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net (loss) income (514,479)us-gaap_ProfitLoss         (553,889)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
39,410us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Convertible perpetual preferred stock dividends (55,525)us-gaap_DividendsPreferredStock         (55,525)us-gaap_DividendsPreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Dec. 31, 2013 $ 3,175,627us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 8us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
$ 483us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 5,294,551us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (8,770)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ (3,460,462)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 1,349,817us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending Balance (in shares) at Dec. 31, 2013   7,650us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Ending Balance (in shares) at Dec. 31, 2013 490,290us-gaap_CommonStockSharesOutstanding   490,290us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember