Basis of Presentation Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of significant concentration risk

Based on the availability of other customers, the Company does not believe the loss of any of these customers would have a significant effect on its business or financial condition.

	Year Ended December 31,
	2012		2011		2010
Shell Trading Co.	30	%	18	%	19	%
Laclede Energy	17	%	20	%	17	%
JP Morgan Ventures Energy	12	%	(a)		(a)
Texon LP	(a)		15	%	17	%
Gary Williams	(a)		11	%	10	%

(a) Less than 10 percent