Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2011
Loss Contingencies [Line Items]
ODEQ cash penalty paid	$ 150,000
Contribution to environmental fund	150,000
Penalty per safety violation	200,000
Penalty for series of safety violations	2,000,000
Operating pressure	30.00%
OG&E Railcar Lease Agreement [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Maximum	$ 22,800,000