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PARTNERS' CAPITAL AND MEMBERSHIP INTERESTS (Bison Acquisition) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 04, 2013
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Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Jun. 04, 2013
General partner
|
Oct. 03, 2012
General partner
|
Mar. 31, 2013
General partner
|
Jun. 03, 2013
Bison Midstream
|
Jun. 04, 2013
Bison Midstream
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Dec. 31, 2013
Bison Midstream
|
Jun. 04, 2013
Bison Midstream
General partner
|
Dec. 31, 2013
Bison Midstream
General partner
|
Jun. 04, 2013
Limited partners, Common
Bison Midstream
|
Dec. 31, 2013
Limited partners, Common
Bison Midstream
|
Jun. 04, 2013
General Partner Units
Bison Midstream
|
Dec. 31, 2013
General Partner Units
Bison Midstream
|
Jun. 04, 2013
Limited Partner Common and General Partner Units
Bison Midstream
|
Jun. 04, 2013
SMP Holdings' equity in Bison Midstream
Bison Midstream
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Dec. 31, 2013
SMP Holdings' equity in Bison Midstream
Bison Midstream
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| Business Acquisition [Line Items] | |||||||||||||||||||
| Cumulative percentage ownership after all transactions | 100.00% | ||||||||||||||||||
| Volume weighted average share price, term | 5 days | ||||||||||||||||||
| Volume weighted average share price | $ 31.53 | ||||||||||||||||||
| Cost of acquired entity, cash paid | $ 200,000 | $ 200,000 | |||||||||||||||||
| Units issued to acquire entity | 200,000 | (978) | (47,936) | (978) | (50,000) | 248,914 | 248,914 | ||||||||||||
| Transaction costs | 2,770 | 2,020 | 3,166 | ||||||||||||||||
| Units issued in connection with acquisition | 1,585,560 | 1,553,849 | 1,553,849 | 31,711 | 31,711 | ||||||||||||||
| Net assets in excess of consideration paid | 56,535 | 56,535 | 0 | 0 | 0 | 1,131 | 1,131 | (56,535) | |||||||||||
| Closing unit price | $ 30.85 | ||||||||||||||||||
| SMP Holdings' net investment in Bison Midstream | $ 305,449 | ||||||||||||||||||
| General partner interest (as a percent) | 2.00% | 2.00% | 2.00% | ||||||||||||||||