CONSOLIDATED BALANCE SHEETS (Parenthetical)	Dec. 31, 2011	Dec. 31, 2010
Partners' capital:
Class C convertible preferred unitholders issued (in units)	16,666,667	0
Class C convertible preferred unitholders outstanding (in units)	16,666,667	0
General partner, issued (in units)	35,729	35,729
General partner, outstanding (in units)	35,729	35,729
Limited Partners-Public Common [Member]
Partners' capital:
Public common unitholders, issued (in units)	17,292,279	15,000,000
Public common unitholders, outstanding (in units)	17,292,279	15,000,000
Limited Partners-Affiliated - Common [Member]
Partners' capital:
Affiliated common unitholders, issued (in units)	11,297,737	11,297,737
Affiliated common unitholders, outstanding (in units)	11,297,737	11,297,737
Limited Partners-Affiliated - Subordinated [Member]
Partners' capital:
Subordinated unit holders, issued (in units)	7,145,866	7,145,866
Subordinated unitholders, outstanding (in units)	7,145,866	7,145,866