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Equity Distributions Earned (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Distributions Earned by Limited or General Partners [Line Items]        
General partner's distributions $ 282 $ 242 $ 816 $ 686
General partner's IDRs 1,032 302 2,396 491
Total general partner's distributions 1,314 544 3,212 1,177
Total limited partners' distributions 13,822 11,850 39,994 33,601
Total cash distributions $ 15,136 $ 12,394 $ 43,206 $ 34,778
Cash distributions per limited partner unit $ 0.570 $ 0.490 [1] $ 1.650 [2] $ 1.390 [1]
Limited Partner [Member] | Common Units [Member]        
Distributions Earned by Limited or General Partners [Line Items]        
Total limited partners' distributions $ 6,983 $ 5,970 $ 20,196 $ 16,922
Limited Partner [Member] | Subordinated Units [Member]        
Distributions Earned by Limited or General Partners [Line Items]        
Total limited partners' distributions $ 6,839 $ 5,880 $ 19,798 $ 16,679
[1] Adjusted to include the historical results of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.
[2] The information presented includes the results of operations of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.