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Equity (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2012
Sep. 25, 2012
Sep. 30, 2012
Sep. 24, 2012
Sep. 30, 2012
Sep. 30, 2012
Common Unitholders [Member]
Sep. 30, 2012
Common Unitholders [Member]
Sep. 30, 2012
Common Unitholders - Public [Member]
Sep. 30, 2012
Common Unitholders - Affiliates [Member]
Sep. 30, 2012
Subordinated Units [Member]
Sep. 30, 2012
Subordinated Units [Member]
Sep. 30, 2012
Subordinated Units [Member]
Sep. 30, 2012
Predecessor [Member]
Sep. 24, 2012
Predecessor [Member]
Sep. 30, 2011
Predecessor [Member]
Sep. 24, 2012
Predecessor [Member]
Sep. 30, 2011
Predecessor [Member]
Sep. 30, 2012
Minimum Quarterly Distribution [Member]
Sep. 30, 2012
Minimum Quarterly Distribution, Prorated [Member]
Sep. 30, 2012
Minimum [Member]
First Target Distribution [Member]
Sep. 30, 2012
Minimum [Member]
Second Target Distribution [Member]
Sep. 30, 2012
Minimum [Member]
Third Target Distribution [Member]
Sep. 30, 2012
Minimum [Member]
Distributions Thereafter [Member]
Sep. 30, 2012
Maximum [Member]
First Target Distribution [Member]
Sep. 30, 2012
Maximum [Member]
Second Target Distribution [Member]
Sep. 30, 2012
Maximum [Member]
Third Target Distribution [Member]
Sep. 30, 2012
SUSS [Member]
Minimum Quarterly Distribution [Member]
Sep. 30, 2012
SUSS [Member]
First Target Distribution [Member]
Sep. 30, 2012
SUSS [Member]
Second Target Distribution [Member]
Sep. 30, 2012
SUSS [Member]
Third Target Distribution [Member]
Sep. 30, 2012
SUSS [Member]
Distributions Thereafter [Member]
Sep. 30, 2012
Common Unitholders [Member]
Minimum Quarterly Distribution [Member]
Sep. 30, 2012
Common Unitholders [Member]
First Target Distribution [Member]
Sep. 30, 2012
Common Unitholders [Member]
Second Target Distribution [Member]
Sep. 30, 2012
Common Unitholders [Member]
Third Target Distribution [Member]
Sep. 30, 2012
Common Unitholders [Member]
Distributions Thereafter [Member]
Nov. 05, 2012
Subsequent Event [Member]
Sep. 30, 2012
SUSS [Member]
Sep. 25, 2012
SUSS [Member]
Sep. 30, 2012
IPO [Member]
SUSS [Member]
Common Units [Member]
Sep. 25, 2012
IPO [Member]
SUSS [Member]
Common Units [Member]
Sep. 30, 2012
IPO [Member]
SUSS [Member]
Subordinated Units [Member]
Sep. 25, 2012
IPO [Member]
SUSS [Member]
Subordinated Units [Member]
Schedule of Partners' Capital [Line Items]                                                                                      
Limited Partners' Capital Account, Units Outstanding               10,925,000 14,436 10,939,436 10,939,436 10,939,436                                                       14,436 14,436 10,939,436 10,939,436
Ownership Percentage                                                                           50.10% 50.10%        
Units sold in IPO   10,925,000                                                                                  
Increase (Decrease) in Partners' Capital [Roll Forward]                                                                                      
Partners' Capital Beginning Balance $ 124,233     $ 115,813 $ 115,813     $ 0 $ 0 $ 0     $ 124,233     $ 115,813                                                      
Net liabilities not assumed by SUSP (56,163)             0 0 0     (56,163)                                                            
Allocation of net Parent investment to unitholders 0             0 90 67,980     (68,070)                                                            
Proceeds from initial public offering, net of underwriters' discount 210,647             210,647 0 0     0                                                            
Offering costs (4,617)             (4,617) 0 0     0                                                            
Cash distributions (206,030)             0 (273) (205,757)     0                                                            
Non-cash stock based compensation 6             3 0 3     0                                                            
Net income 574   3,618 8,420 8,994 287 287 287 0 287 287 287 0 3,044 3,137 8,420 8,524                                                    
Partners' Capital Ending Balance 68,650 124,233 68,650   68,650     206,320 (183) (137,487) (137,487) (137,487) 0                                                            
Distributions Made to Members or Limited Partners [Abstract]                                                                                      
Distributions           312 312       312 312                                                              
Undistributed earnings           (25) (25)       (25) (25)                                                              
Net income 574   3,618 8,420 8,994 287 287 287 0 287 287 287 0 3,044 3,137 8,420 8,524                                                    
Distributions declared per unit     $ 0.0285   $ 0.0285                                                               $ 0.0285            
Incentive Distributions, Members or Limited Partners [Abstract]                                                                                      
Total quarterly distribution per unit target amount                                   $ 0.4375 $ 0.4375 $ 0.4375 $ 0.503125 $ 0.546875 $ 0.656250 $ 0.503125 $ 0.546875 $ 0.656250                                  
Marginal percentage interest in distributions                                                     0.00% 0.00% 15.00% 25.00% 50.00% 100.00% 100.00% 85.00% 75.00% 50.00%              
Distribution Made to Member or Limited Partner, Cash Distributions Declared                                                                         $ 624