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Rose Rock Midstream, L.P. (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended
Feb. 13, 2012
Distribution of Q4 2011 earnings (pro-rated) [Member]
Sep. 30, 2013
Distribution of Q4 2011 earnings (pro-rated) [Member]
Feb. 13, 2012
Distribution of Q4 2011 earnings (pro-rated) [Member]
SemGroup [Member]
Common Units [Member]
Feb. 13, 2012
Distribution of Q4 2011 earnings (pro-rated) [Member]
SemGroup [Member]
Subordinated Units [Member]
Feb. 13, 2012
Distribution of Q4 2011 earnings (pro-rated) [Member]
Noncontrolling Interest [Member]
Feb. 13, 2012
Distribution of Q4 2011 earnings (pro-rated) [Member]
SemGroup [Member]
May 15, 2012
Distribution of Q1 2012 earnings [Member]
Sep. 30, 2013
Distribution of Q1 2012 earnings [Member]
May 15, 2012
Distribution of Q1 2012 earnings [Member]
SemGroup [Member]
Common Units [Member]
May 15, 2012
Distribution of Q1 2012 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
May 15, 2012
Distribution of Q1 2012 earnings [Member]
Noncontrolling Interest [Member]
May 15, 2012
Distribution of Q1 2012 earnings [Member]
SemGroup [Member]
Aug. 14, 2012
Distribution of Q2 2012 earnings [Member]
Sep. 30, 2013
Distribution of Q2 2012 earnings [Member]
Aug. 14, 2012
Distribution of Q2 2012 earnings [Member]
SemGroup [Member]
Common Units [Member]
Aug. 14, 2012
Distribution of Q2 2012 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
Aug. 14, 2012
Distribution of Q2 2012 earnings [Member]
Noncontrolling Interest [Member]
Aug. 14, 2012
Distribution of Q2 2012 earnings [Member]
SemGroup [Member]
Nov. 14, 2012
Distribution of Q3 2012 earnings [Member]
Sep. 30, 2013
Distribution of Q3 2012 earnings [Member]
Nov. 14, 2012
Distribution of Q3 2012 earnings [Member]
SemGroup [Member]
Common Units [Member]
Nov. 14, 2012
Distribution of Q3 2012 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
Nov. 14, 2012
Distribution of Q3 2012 earnings [Member]
Noncontrolling Interest [Member]
Nov. 14, 2012
Distribution of Q3 2012 earnings [Member]
SemGroup [Member]
Nov. 14, 2012
Distribution of Q3 2012 earnings [Member]
SemGroup [Member]
Feb. 14, 2013
Distribution of Q4 2012 earnings [Member]
Sep. 30, 2013
Distribution of Q4 2012 earnings [Member]
Feb. 14, 2013
Distribution of Q4 2012 earnings [Member]
SemGroup [Member]
Common Units [Member]
Feb. 14, 2013
Distribution of Q4 2012 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
Feb. 14, 2013
Distribution of Q4 2012 earnings [Member]
Noncontrolling Interest [Member]
Feb. 14, 2013
Distribution of Q4 2012 earnings [Member]
SemGroup [Member]
May 15, 2013
Distribution of Q1 2013 earnings [Member]
Sep. 30, 2013
Distribution of Q1 2013 earnings [Member]
May 15, 2013
Distribution of Q1 2013 earnings [Member]
SemGroup [Member]
Common Units [Member]
May 15, 2013
Distribution of Q1 2013 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
May 15, 2013
Distribution of Q1 2013 earnings [Member]
Noncontrolling Interest [Member]
May 15, 2013
Distribution of Q1 2013 earnings [Member]
SemGroup [Member]
Aug. 14, 2013
Distribution of Q2 2013 earnings [Member]
Sep. 30, 2013
Distribution of Q2 2013 earnings [Member]
Aug. 14, 2013
Distribution of Q2 2013 earnings [Member]
SemGroup [Member]
Common Units [Member]
Aug. 14, 2013
Distribution of Q2 2013 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
Aug. 14, 2013
Distribution of Q2 2013 earnings [Member]
Noncontrolling Interest [Member]
Aug. 14, 2013
Distribution of Q2 2013 earnings [Member]
SemGroup [Member]
Nov. 14, 2013
Distribution of Q3 2013 earnings [Member]
Sep. 30, 2013
Distribution of Q3 2013 earnings [Member]
Nov. 14, 2013
Distribution of Q3 2013 earnings [Member]
SemGroup [Member]
Common Units [Member]
Nov. 14, 2013
Distribution of Q3 2013 earnings [Member]
SemGroup [Member]
Subordinated Units [Member]
Nov. 14, 2013
Distribution of Q3 2013 earnings [Member]
Noncontrolling Interest [Member]
Nov. 14, 2013
Distribution of Q3 2013 earnings [Member]
SemGroup [Member]
Distributions paid or to be paid                                                                                                  
Distribution per unit $ 0.0670 [1]           $ 0.3725           $ 0.3825           $ 0.3925             $ 0.4025           $ 0.4300           $ 0.4400                      
Record Date   Feb. 03, 2012           May 07, 2012           Aug. 06, 2012           Nov. 05, 2012             Feb. 04, 2013           May 06, 2013           Aug. 05, 2013           Nov. 05, 2013        
Distribution Date   Feb. 13, 2012           May 15, 2012           Aug. 14, 2012           Nov. 14, 2012             Feb. 14, 2013           May 15, 2013           Aug. 14, 2013           Nov. 14, 2013        
Distribution Made to Limited Partner, Distributions Declared, Per Unit                                                                                       $ 0.4500 [2]          
Managing Member or General Partner, Subsequent Distribution Amount                                                                                                 $ 232
General partner distributions           23           128           131           134             167           179           183            
Incentive distributions           0           0           0             0           0           41           72           127
Limited partner distributions     93 561 470       517 3,125 2,607       532 3,209 2,678       545 3,294 2,748         1,163 3,377 3,624       1,242 3,607 3,872       1,271 3,692 3,962              
Distribution Made to Limited Partner, Cash Distributions Declared                                                                                           1,301 3,775 6,189  
Partners' Capital Account, Distributions $ 1,147           $ 6,377           $ 6,550           $ 6,721             $ 8,331           $ 8,941           $ 9,180           $ 11,624          
[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] **Expected payment date and amounts for distributions related to the quarter ended September 30, 2013.