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CONDENSED CONSOLIDATED STATEMENT 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
Non-controlling Interest
Beginning Balance at Dec. 31, 2014 $ 3,209,820us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 6us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
$ 477us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 5,201,524us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (6,980)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ (3,257,202)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 1,271,995us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Beginning Balance (in shares) at Dec. 31, 2014   5,650us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Beginning Balance (in shares) at Dec. 31, 2014 484,819us-gaap_CommonStockSharesOutstanding   484,819us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity              
Distributions to noncontrolling interest owners (43,716)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders           (43,716)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Purchase of treasury stock (1,218)us-gaap_TreasuryStockValueAcquiredCostMethod       (1,218)us-gaap_TreasuryStockValueAcquiredCostMethod
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Retirement of treasury stock 0us-gaap_TreasuryStockRetiredCostMethodAmount     (1,218)us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
1,218us-gaap_TreasuryStockRetiredCostMethodAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock distributions, net of purchases - retirement plans (in shares)     (210)sd_TreasuryStockNonqualifiedPlanShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock distributions, net of purchases - retirement plans (54)sd_TreasuryStockNonqualifiedPlanValue     244sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(298)sd_TreasuryStockNonqualifiedPlanValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
   
Stock-based compensation 4,840us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue     4,840us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Cancellation of restricted stock awards, net of issuance (in shares)     (837)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Cancellation of restricted stock awards, net of issuance 0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures   2us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(2)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net loss (1,151,874)us-gaap_ProfitLoss         (1,034,953)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(116,921)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Convertible perpetual preferred stock dividends (10,881)us-gaap_DividendsPreferredStock         (10,881)us-gaap_DividendsPreferredStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
 
Ending Balance at Mar. 31, 2015 $ 2,006,917us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 6us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
$ 479us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 5,205,388us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (7,278)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
$ (4,303,036)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 1,111,358us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending Balance (in shares) at Mar. 31, 2015 483,772us-gaap_CommonStockSharesOutstanding   483,772us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Ending Balance (in shares) at Mar. 31, 2015   5,650us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember