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Equity (Details) (USD $)
 0 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Nov. 04, 2013
Aug. 05, 2013
Sep. 30, 2012
Sep. 24, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Common Unitholders [Member]
Sep. 30, 2012
Common Unitholders [Member]
Sep. 30, 2013
Common Unitholders [Member]
Sep. 30, 2012
Common Unitholders [Member]
Sep. 30, 2013
Common Unitholders - Public [Member]
Dec. 31, 2012
Common Unitholders - Public [Member]
Sep. 30, 2013
Common Unitholders - Affiliates [Member]
Dec. 31, 2012
Common Unitholders - Affiliates [Member]
Sep. 30, 2013
Subordinated Units [Member]
Sep. 30, 2012
Subordinated Units [Member]
Sep. 30, 2013
Subordinated Units [Member]
Sep. 30, 2012
Subordinated Units [Member]
Dec. 31, 2012
Subordinated Units [Member]
Sep. 24, 2012
Predecessor [Member]
Sep. 24, 2012
Predecessor [Member]
Sep. 30, 2013
Minimum Quarterly Distribution [Member]
Sep. 30, 2013
Minimum Quarterly Distribution, Prorated [Member]
Jun. 30, 2013
Minimum Quarterly Distribution, Prorated [Member]
Sep. 30, 2013
Minimum [Member]
First Target Distribution [Member]
Sep. 30, 2013
Minimum [Member]
Second Target Distribution [Member]
Sep. 30, 2013
Minimum [Member]
Third Target Distribution [Member]
Sep. 30, 2013
Minimum [Member]
Distributions Thereafter [Member]
Sep. 30, 2013
Maximum [Member]
First Target Distribution [Member]
Sep. 30, 2013
Maximum [Member]
Second Target Distribution [Member]
Sep. 30, 2013
Maximum [Member]
Third Target Distribution [Member]
Sep. 30, 2013
SUSS [Member]
Minimum Quarterly Distribution [Member]
Sep. 30, 2013
SUSS [Member]
First Target Distribution [Member]
Sep. 30, 2013
SUSS [Member]
Second Target Distribution [Member]
Sep. 30, 2013
SUSS [Member]
Third Target Distribution [Member]
Sep. 30, 2013
SUSS [Member]
Distributions Thereafter [Member]
Sep. 30, 2013
Common Unitholders [Member]
Minimum Quarterly Distribution [Member]
Sep. 30, 2013
Common Unitholders [Member]
First Target Distribution [Member]
Sep. 30, 2013
Common Unitholders [Member]
Second Target Distribution [Member]
Sep. 30, 2013
Common Unitholders [Member]
Third Target Distribution [Member]
Sep. 30, 2013
Common Unitholders [Member]
Distributions Thereafter [Member]
Sep. 30, 2013
SUSS [Member]
Sep. 25, 2012
SUSS [Member]
Sep. 29, 2012
IPO [Member]
SUSS [Member]
Common Units [Member]
Sep. 25, 2012
IPO [Member]
SUSS [Member]
Common Units [Member]
Sep. 29, 2012
IPO [Member]
SUSS [Member]
Subordinated Units [Member]
Sep. 25, 2012
IPO [Member]
SUSS [Member]
Subordinated Units [Member]
Sep. 06, 2013
GFI Acquisition [Member]
SUSS [Member]
Common Units [Member]
Schedule of Partners' Capital [Line Items]                                                                                                    
Distribution Made to Limited Partner, Cash Distributions Declared $ 10,300,000 $ 9,900,000         $ 29,100,000                                                                                      
Limited Partners' Capital Account, Units Outstanding                         10,932,834 10,925,000 79,308 14,436 10,939,436   10,939,436   10,939,436                                                 14,436 14,436 10,939,436 10,939,436  
Ownership Percentage                                                                                       50.20% 50.10%          
Limited Partners' Capital Account, Units Issued                         10,932,834 10,925,000 79,308 14,436 10,939,436   10,939,436   10,939,436                                                         64,872
Units sold in IPO       10,925,000                                                                                            
Net income     574,000   9,597,000 3,617,000 27,504,000 8,994,000 4,804,000 287,000 13,758,000 287,000         4,793,000 287,000 13,747,000 287,000   3,043,000 8,420,000                                                      
Distributions Made to Members or Limited Partners [Abstract]                                                                                                    
Distributions                 5,165,000 312,000 14,904,000 312,000         5,124,000 312,000 14,863,000 312,000                                                            
Undistributed earnings                 (361,000) (25,000) (1,146,000) (25,000)         (331,000) (25,000) (1,116,000) (25,000)                                                            
Net income     $ 574,000   $ 9,597,000 $ 3,617,000 $ 27,504,000 $ 8,994,000 $ 4,804,000 $ 287,000 $ 13,758,000 $ 287,000         $ 4,793,000 $ 287,000 $ 13,747,000 $ 287,000   $ 3,043,000 $ 8,420,000                                                      
Incentive Distributions, Members or Limited Partners [Abstract]                                                                                                    
Total quarterly distribution per unit target amount                                               $ 0.4375 $ 0.4687 $ 0.4528 $ 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%