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Segment Information and Major Customers (Details)	12 Months Ended
	Dec. 31, 2012
Plains All American Inc, Oil Purchasers [Member]
Segment information by major customers
Revenue by major customers	57.00%
Sunoco Inc, Oil Purchasers [Member]
Segment information by major customers
Revenue by major customers	26.00%
Atlas Pipeline Mid-Continent, Gas Purchasers [Member]
Segment information by major customers
Revenue by major customers	45.00%
Unimark LLC, Gas Purchasers [Member]
Segment information by major customers
Revenue by major customers	14.00%

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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X

- Details

Name:	us-gaap_SegmentsGeographicalAreasAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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