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Concentrations of Credit Risk - Schedule of Credit Risk (Details) (Net revenue, Major Customers)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Plains Marketing L.P. (includes Delhi production)
Concentrations of Credit Risk
Percent of Total Revenue	96.00%	90.00%	84.00%
Enterprise Crude Oil LLC
Concentrations of Credit Risk
Percent of Total Revenue	2.00%	4.00%	7.00%
Flint Hills
Concentrations of Credit Risk
Percent of Total Revenue	1.00%	2.00%	1.00%
ETC Texas Pipeline, LTD.
Concentrations of Credit Risk
Percent of Total Revenue	1.00%	0.00%	3.00%
All others
Concentrations of Credit Risk
Percent of Total Revenue	0.00%	4.00%	5.00%
Total
Concentrations of Credit Risk
Percent of Total Revenue	100.00%	100.00%	100.00%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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