Partners Capital - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended	12 Months Ended				9 Months Ended		1 Months Ended	9 Months Ended		1 Months Ended		6 Months Ended	9 Months Ended
	Nov. 30, 2010	Jun. 30, 2012	Dec. 31, 2008	Dec. 31, 2011	Dec. 31, 2010	Nov. 17, 2010	Sep. 30, 2011 Messrs. Imad K. Anbouba	Sep. 30, 2011 Carter R. Montgomery	May 31, 2011 Cushing MLP Opportunity Fund I L.P.	Sep. 30, 2011 Cushing MLP Opportunity Fund I L.P.	May 26, 2011 Cushing MLP Opportunity Fund I L.P.	May 31, 2011 Sanctuary Capital LLC	May 26, 2011 Sanctuary Capital LLC	Jun. 30, 2012 Minimum	Sep. 30, 2011 Maximum
Limited Partners' Capital Account [Line Items]
Outstanding Common Units vote required to remove General Partner														80.00%
Beneficial ownership of any class of units then outstanding to lose voting rights on all of its units														20.00%
Newly issued Common Units sold to Central Energy, LP and Penn Octane, shares						12,724,019
Newly issued Common Units sold to Central Energy, LP and Penn Octane, value		$ 195,000		$ 903,000		$ 3,950,000
Common Units of Central											7,413,013		1,017,922
Common Units of Central, percentage hold by others individually		100.00%							46.70%			6.40%			5.00%
General Partner, GP Interest in Central		2.00%					30.17%	30.17%		25.00%
Penn Octane and affiliate interest sold to Central Energy LP	100.00%
Penn Octane's interest sold to Central Energy Partners LP, value	150,000
Distribution to Central Unitholders per quarter		$ 0.25			$ 0.25
Distributions payment after the end of each calendar quarter, period		45 days
Distributions made to unit holders			1,308,000
Distributions made to General Partner			$ 27,000
Percentage of total Common Units issued and outstanding hold by Central Energy, LP		80.00%