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Condensed Consolidated Balance Sheets (Unaudited), (Parenthetical)
Jun. 30, 2014
Dec. 31, 2013
EQUITY    
Common units issued (units) 54,461,052 39,148,916
Subordinated units issued (units) 0 15,254,890
General partner units issued (units) 1,110,282 1,110,282
Common units outstanding (units) 54,461,052 39,148,916
Subordinated units outstanding (units) 0 15,254,890
General partner units outstanding (units) 1,110,282 1,110,282