Condensed Consolidated Balance Sheets (Parenthetical)	Mar. 31, 2014	Dec. 31, 2013
Common Units
Units issued	189,272,367	177,801,147
Units outstanding	189,272,367	177,801,147
Convertible Class B Units
Units issued	12,553,322	12,424,358
Units outstanding	12,553,322	12,424,358
Subordinated Class C Units
Units issued	0	11,199,268
Units outstanding	0	11,199,268