Quarterly report pursuant to Section 13 or 15(d)

Related Parties Transactions (Details)

v2.4.0.8
Related Parties Transactions (Details) (USD $)
In Millions, unless otherwise specified
Oct. 31, 2009
Nautilus Poplar, LLC (NP)
owner
Sep. 30, 2012
US Federal Tax Withholding
Sep. 30, 2012
US Federal Tax Withholding
Young Energy Prize S.A. (YEP)
Sep. 30, 2012
US Federal Tax Withholding
White Bear, LLC
Sep. 30, 2012
US Federal Tax Withholding
Nautilus Poplar, LLC (NP)
Related Party Transaction [Line Items]          
Loss Contingency, Estimate of Possible Loss   $ 0.1 $ 0.6 $ 1.3 $ 2.0
Business Acquisition, Percentage of Membership Interests Acquire 83.50%        
Number of Majority Owners 2