Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Description of Operations) (Details)

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Basis of Presentation (Description of Operations) (Details) (USD $)
3 Months Ended
Sep. 30, 2014
segment
Sep. 30, 2013
Schedule of Equity Method Investments [Line Items]    
Number of reportable segments 3  
Impairment on AFS securities $ 0 $ 0
Central Petroleum Limited
   
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 11.00%