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Partners' Capital - Partnership Units (Table) (Details) - shares
Jun. 30, 2015
Dec. 31, 2014
Partners' Capital (Abstract)    
Limited partner units 119,559,456 104,079,960
General partner units 2,439,989 2,124,081
Preferred partner units 12,983,333 14,223,737
Total partnership units 134,982,778 120,427,778