Acquisitions Acquisition - 1 (Details) (Permian [Member], USD $)	1 Months Ended
Nov. 30, 2014
Permian [Member]
Business Acquisition [Line Items]
Number of limited partner units issued - acquisition	5,800,000
Total consideration transferred	$ 117,600,000
Consideration paid in cash	21,600,000
Value of units issued	96,000,000
Oil properties	119,438,000
Total assets acquired	119,438,000
Asset retirement obligation	1,851,000
Net assets acquired	$ 117,587,000

Business Acquisition Purchase Price Allocation Asset Retirement Obligations

No definition available.

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- Definition

Business Acquisition Purchase Price Allocation Oil And Gas Properties

+ References

No definition available.

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)(4)

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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-Topic 805

-SubTopic 30

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-Name Accounting Standards Codification

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-Section 50

-Paragraph 1

-Subparagraph (b)

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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

+ References

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- Definition

Amount of assets acquired at the acquisition date.

+ References

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Topic 805

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-Section 55

-Paragraph 37

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- Definition

The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

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