Condensed Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2013	Sep. 16, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Common units, issued	88,690,985	5,750,000	81,202,752
Common units, outstanding	88,690,985		81,202,752	81,203,000	71,965,000