Supplemental Oil and Gas Information - Proved Oil and Gas Quantities (Details)	12 Months Ended
Jun. 30, 2012
United States \| Oil
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Average Sales Prices	84.94
Australia \| Gas
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Average Sales Prices	4.64

The revenues derived from sales of oil or gas in each geographic area during the reporting period divided by the number of barrels of oil produced or thousands of cubic feet of gas produced.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 3

-Subparagraph A

Name:	us-gaap_AverageSalesPrices
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration