Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions (Details)

v2.4.0.6
Related Party Transactions (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
US Federal Tax Withholding
Mar. 31, 2013
US Federal Tax Withholding
Accrued and Other Liabilities
Mar. 31, 2012
Young Energy Prize S.A. (YEP)
US Federal Tax Withholding
Mar. 31, 2012
White Bear, LLC
US Federal Tax Withholding
Oct. 31, 2009
Nautilus Poplar, LLC (NP)
owner
Mar. 31, 2012
Nautilus Poplar, LLC (NP)
US Federal Tax Withholding
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  
Loss Contingency Accrual, at Carrying Value     0.1        
Noninterest Income, Other Operating Income $ 0.4