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Rose Rock Midstream, L.P. (Details 2) (Rose Rock Midstream L P [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
0 Months Ended
Feb. 13, 2012
May 15, 2012
Aug. 14, 2012
Nov. 14, 2012
Feb. 14, 2013
May 15, 2013
Aug. 14, 2013
Nov. 14, 2013
Feb. 14, 2014
May 15, 2014
Aug. 14, 2014
Nov. 14, 2014
Feb. 13, 2015
Distribution of Q4 2011 earnings (pro-rated) [Member]
                         
Distributions Paid                          
Distribution per unit $ 0.0670us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42011earningsproratedMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
[1]                        
Total distributions $ 1,147us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42011earningsproratedMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                       
Distribution of Q1 2012 earnings [Member]
                         
Distributions Paid                          
Distribution per unit   $ 0.3725us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                     
Total distributions   6,377us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                     
Distribution of Q2 2012 earnings [Member]
                         
Distributions Paid                          
Distribution per unit     $ 0.3825us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                   
Total distributions     6,550us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                   
Distribution of Q3 2012 earnings [Member]
                         
Distributions Paid                          
Distribution per unit       $ 0.3925us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                 
Total distributions       6,721us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
                 
Distribution of Q4 2012 earnings [Member]
                         
Distributions Paid                          
Distribution per unit         $ 0.4025us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
               
Total distributions         8,331us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
               
Distribution of Q1 2013 earnings [Member]
                         
Distributions Paid                          
Distribution per unit           $ 0.4300us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
             
Total distributions           8,941us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
             
Distribution of Q2 2013 earnings [Member]
                         
Distributions Paid                          
Distribution per unit             $ 0.4400us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
           
Total distributions             9,180us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
           
Distribution of Q3 2013 earnings [Member]
                         
Distributions Paid                          
Distribution per unit               $ 0.4500us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
         
Total distributions               11,624us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
         
Distribution of Q4 2013 earnings [Member]
                         
Distributions Paid                          
Distribution per unit                 $ 0.4650us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
       
Total distributions                 12,841us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
       
Distribution of Q1 2014 earnings [Member]
                         
Distributions Paid                          
Distribution per unit                   $ 0.4950us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
     
Total distributions                   13,903us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
     
Distribution of Q2 2014 earnings [Member]
                         
Distributions Paid                          
Distribution per unit                     $ 0.5350us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
   
Total distributions                     16,718us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
   
Distribution of Q3 2014 earnings [Member]
                         
Distributions Paid                          
Distribution per unit                       $ 0.5750us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
 
Total distributions                       18,866us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
 
Subsequent Event [Member] | Distribution of Q4 2014 earnings [Member]
                         
Distributions Paid                          
Distribution per unit                         $ 0.6200us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
[2]
Total distributions                         24,269us-gaap_PartnersCapitalAccountDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q4 2011 earnings (pro-rated) [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions 470us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42011earningsproratedMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
                       
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q1 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions   2,607us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
                     
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q2 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions     2,678us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
                   
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q3 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions       2,748us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
                 
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q4 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions         3,624us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
               
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q1 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions           3,872us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
             
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q2 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions             3,962us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
           
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q3 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions               6,189us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
         
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q4 2013 earnings [Member]
                         
Distributions Paid                          
Limited partner distributions                 6,398us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42013earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
       
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q1 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions                   6,811us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
     
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q2 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions                     7,362us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
   
Limited Partner [Member] | Noncontrolling Interest [Member] | Distribution of Q3 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions                       7,912us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
 
Limited Partner [Member] | Noncontrolling Interest [Member] | Subsequent Event [Member] | Distribution of Q4 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions                         8,544us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Limited Partner [Member] | Parent [Member] | Distribution of Q4 2011 earnings (pro-rated) [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions 93us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42011earningsproratedMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                       
Limited Partner [Member] | Parent [Member] | Distribution of Q4 2011 earnings (pro-rated) [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions 561us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42011earningsproratedMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_SubordinatedUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                       
Limited Partner [Member] | Parent [Member] | Distribution of Q1 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions   517us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                     
Limited Partner [Member] | Parent [Member] | Distribution of Q1 2012 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions   3,125us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ12012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_SubordinatedUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                     
Limited Partner [Member] | Parent [Member] | Distribution of Q2 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions     532us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                   
Limited Partner [Member] | Parent [Member] | Distribution of Q2 2012 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions     3,209us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ22012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_SubordinatedUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                   
Limited Partner [Member] | Parent [Member] | Distribution of Q3 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions       545us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_CommonUnitsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
                 
Limited Partner [Member] | Parent [Member] | Distribution of Q3 2012 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions       3,294us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32012earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
/ us-gaap_StatementClassOfStockAxis
= semg_SubordinatedUnitsMember
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Limited Partner [Member] | Parent [Member] | Distribution of Q4 2012 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q4 2012 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q1 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q1 2013 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q2 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q2 2013 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q3 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q3 2013 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q4 2013 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q4 2013 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Distribution of Q1 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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= us-gaap_ParentMember
     
Limited Partner [Member] | Parent [Member] | Distribution of Q1 2014 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
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= us-gaap_ParentMember
     
Limited Partner [Member] | Parent [Member] | Distribution of Q2 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions                     3,646us-gaap_LimitedPartnersCapitalAccountDistributionAmount
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Limited Partner [Member] | Parent [Member] | Distribution of Q2 2014 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions                     4,488us-gaap_LimitedPartnersCapitalAccountDistributionAmount
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= semg_DistributionofQ22014earningsMember
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= us-gaap_ParentMember
   
Limited Partner [Member] | Parent [Member] | Distribution of Q3 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
Limited partner distributions                       3,918us-gaap_LimitedPartnersCapitalAccountDistributionAmount
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Limited Partner [Member] | Parent [Member] | Distribution of Q3 2014 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions                       4,824us-gaap_LimitedPartnersCapitalAccountDistributionAmount
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Limited Partner [Member] | Parent [Member] | Subsequent Event [Member] | Distribution of Q4 2014 earnings [Member] | Common Unit [Member]
                         
Distributions Paid                          
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Limited Partner [Member] | Parent [Member] | Subsequent Event [Member] | Distribution of Q4 2014 earnings [Member] | Subordinated Units [Member]
                         
Distributions Paid                          
Limited partner distributions                         5,202us-gaap_LimitedPartnersCapitalAccountDistributionAmount
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42014earningsMember
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General Partner [Member] | Parent [Member] | Distribution of Q4 2011 earnings (pro-rated) [Member]
                         
Distributions Paid                          
General partner distributions 23us-gaap_GeneralPartnerDistributions
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= us-gaap_GeneralPartnerMember
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= us-gaap_ParentMember
                       
Incentive distributions 0us-gaap_IncentiveDistributionDistributionPerYear
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General Partner [Member] | Parent [Member] | Distribution of Q1 2012 earnings [Member]
                         
Distributions Paid                          
General partner distributions   128us-gaap_GeneralPartnerDistributions
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Incentive distributions   0us-gaap_IncentiveDistributionDistributionPerYear
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General Partner [Member] | Parent [Member] | Distribution of Q2 2012 earnings [Member]
                         
Distributions Paid                          
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General Partner [Member] | Parent [Member] | Distribution of Q3 2012 earnings [Member]
                         
Distributions Paid                          
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General Partner [Member] | Parent [Member] | Distribution of Q4 2012 earnings [Member]
                         
Distributions Paid                          
General partner distributions         167us-gaap_GeneralPartnerDistributions
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General Partner [Member] | Parent [Member] | Distribution of Q1 2013 earnings [Member]
                         
Distributions Paid                          
General partner distributions           179us-gaap_GeneralPartnerDistributions
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General Partner [Member] | Parent [Member] | Distribution of Q2 2013 earnings [Member]
                         
Distributions Paid                          
General partner distributions             183us-gaap_GeneralPartnerDistributions
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General Partner [Member] | Parent [Member] | Distribution of Q3 2013 earnings [Member]
                         
Distributions Paid                          
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General Partner [Member] | Parent [Member] | Distribution of Q4 2013 earnings [Member]
                         
Distributions Paid                          
General partner distributions                 257us-gaap_GeneralPartnerDistributions
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Incentive distributions                 244us-gaap_IncentiveDistributionDistributionPerYear
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General Partner [Member] | Parent [Member] | Distribution of Q1 2014 earnings [Member]
                         
Distributions Paid                          
General partner distributions                   278us-gaap_GeneralPartnerDistributions
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Incentive distributions                   488us-gaap_IncentiveDistributionDistributionPerYear
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General Partner [Member] | Parent [Member] | Distribution of Q2 2014 earnings [Member]
                         
Distributions Paid                          
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Incentive distributions                     888us-gaap_IncentiveDistributionDistributionPerYear
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General Partner [Member] | Parent [Member] | Distribution of Q3 2014 earnings [Member]
                         
Distributions Paid                          
General partner distributions                       377us-gaap_GeneralPartnerDistributions
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/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
 
Incentive distributions                       1,835us-gaap_IncentiveDistributionDistributionPerYear
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ32014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
 
General Partner [Member] | Parent [Member] | Subsequent Event [Member] | Distribution of Q4 2014 earnings [Member]
                         
Distributions Paid                          
General partner distributions                         485us-gaap_GeneralPartnerDistributions
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Incentive distributions                         $ 3,487us-gaap_IncentiveDistributionDistributionPerYear
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= semg_DistributionofQ42014earningsMember
/ dei_LegalEntityAxis
= semg_RoseRockMidstreamLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
[1] *Minimum quarterly distribution for quarter ended December 31, 2011 was prorated for the period beginning immediately after the closing of Rose Rock’s IPO, December 14, 2011 through December 31, 2011.
[2] ** The distribution to common unitholders related to earnings for the quarter ended December 31, 2014 was payable on February 13, 2015 to holders of record at February 3, 2015. As such, the Class A units, which converted to common units on January 1, 2015, were eligible for the distribution which is reflected in the amount paid to common unitholders.