Represents the assumption of capital commitments in a joint venture.

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- Definition

Represents the initial purchase price negotiated by the entity prior to closing adjustments.

+ References

No definition available.

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- Definition

Represents the contingent payment in the event of Lease Option exercise.

+ References

No definition available.

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- Definition

Contingent payment in the event of marine crude storage terminal constructed on leased premises or within stated proximity of (a "Project").

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No definition available.

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- Definition

Proved Developed Reserves, Percentage

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No definition available.

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- Definition

Represents the seller's estimation of proved reserves from producing wellbores.

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No definition available.

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- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

+ 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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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
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- Definition

Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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- Definition

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

+ References

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- Definition

Energy measure of oil and natural gas production reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204

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Data Type:	num:energyItemType
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- Definition

The total number of producing oil wells and oil wells capable of production, in which the entity owns a fractional working interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1208
-Paragraph (a)

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- Definition

Energy measure of interests in proved developed reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas.

+ References

No definition available.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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No definition available.

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Subsequent Events (Details)								1 Months Ended	2 Months Ended	9 Months Ended
Subsequent Events (Details)	Oct. 31, 2016 $ / shares	Oct. 06, 2016 USD ($) Boe MBoe item	Aug. 10, 2016 $ / shares	Jul. 05, 2016 USD ($)	May 10, 2016 $ / shares	Feb. 09, 2016 $ / shares	Mar. 31, 2015 USD ($)	Jul. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Subsequent Event [Line Items]
Cash payment for acquisition, net										$ 81,378,000
Common Units
Subsequent Event [Line Items]
Distribution declared per unit \| $ / shares			$ 0.4183		$ 0.4121	$ 0.406
Class B Preferred
Subsequent Event [Line Items]
Distribution declared per unit \| $ / shares			$ 0.450		$ 0.450	$ 0.3815
Subsequent Event \| Common Units
Subsequent Event [Line Items]
Distribution declared per unit \| $ / shares	$ 0.4246
Subsequent Event \| Class B Preferred
Subsequent Event [Line Items]
Distribution declared per unit \| $ / shares	$ 0.45
Subsequent Event \| SN Terminal, LLC
Subsequent Event [Line Items]
Contingent payment in the event of Lease Option exercise		$ 1.00
Contingent payment in the event of marine crude storage terminal construction		250,000
Carnero Processing LLC Joint Venture \| Subsequent Event
Subsequent Event [Line Items]
Payments to acquire interest in joint venture		47,700,000
Assumption of capital commitments in joint venture		$ 32,300,000
Ownership interest (as a percent)		50.00%
Carnero Gathering LLC, Joint Venture
Subsequent Event [Line Items]
Payments to acquire interest in joint venture				$ 37,000,000				$ 3,000,000	$ 3,000,000
Assumption of capital commitments in joint venture				$ 7,400,000
Ownership interest (as a percent)				50.00%
Carnero Gathering LLC, Joint Venture \| Subsequent Event \| SN Midstream
Subsequent Event [Line Items]
Ownership interest (as a percent)		50.00%
TPL South Tex Processing Company LP
Subsequent Event [Line Items]
Ownership interest (as a percent)				50.00%
TPL South Tex Processing Company LP \| Subsequent Event
Subsequent Event [Line Items]
Ownership interest (as a percent)		50.00%
SN Cotulla Assets, LLC and SN Palmetto, LLC \| Subsequent Event \| SEP Holdings IV, LLC
Subsequent Event [Line Items]
Initial purchase price		$ 27,000,000
Closing adjustments		2,100,000
Cash payment for acquisition, net		$ 24,900,000
Producing wellbores \| item		11
Expected production, Boe/d \| Boe		700
Seller's estimate, proved reserves (energy) \| MBoe		2,136
Estimated proved reserves (energy) \| MBoe		1,800
SN Cotulla Assets, LLC and SN Palmetto, LLC \| Subsequent Event \| SEP Holdings IV, LLC \| Oil
Subsequent Event [Line Items]
Percentage of reserves		73.00%
SN Cotulla Assets, LLC and SN Palmetto, LLC \| Subsequent Event \| SEP Holdings IV, LLC \| Natural Gas Liquids
Subsequent Event [Line Items]
Percentage of reserves		13.00%
SN Cotulla Assets, LLC and SN Palmetto, LLC \| Subsequent Event \| SEP Holdings IV, LLC \| Natural Gas
Subsequent Event [Line Items]
Percentage of reserves		14.00%
Eagle Ford
Subsequent Event [Line Items]
Initial purchase price							$ 85,000,000
Eagle Ford \| Sanchez Energy Corporation
Subsequent Event [Line Items]
Initial purchase price							85,000,000
Closing adjustments							1,400,000
Cash payment for acquisition, net							$ 81,600,000
Eagle Ford \| SN Cotulla Assets, LLC and SN Palmetto, LLC \| Subsequent Event \| SEP Holdings IV, LLC
Subsequent Event [Line Items]
Producing wellbores \| item		23