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Leases Leases (Details)
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3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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Pinedale Liquids Gathering System [Member]
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| Operating Leased Assets [Line Items] | |||||
| Percentage of total leased properties | 80.32% | 80.32% | 94.23% | ||
| Percentage of leased property revenue | 71.85% | 88.68% | 73.42% | 88.68% | |
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Portland Terminal Facility [Member]
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| Operating Leased Assets [Line Items] | |||||
| Percentage of total leased properties | 16.21% | 16.21% | 0.00% | ||
| Percentage of leased property revenue | 19.12% | 0.00% | 17.35% | 0.00% | |
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Public Service Copmany of New Mexico [Member]
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| Operating Leased Assets [Line Items] | |||||
| Percentage of total leased properties | 3.47% | 3.47% | 5.77% | ||
| Percentage of leased property revenue | 9.03% | 11.32% | 9.23% | 11.32% | |