Quarterly report pursuant to Section 13 or 15(d)

- Significant Leases (Details)

v3.3.0.814
- Significant Leases (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Pinedale Liquids Gathering System [Member]          
Operating Leased Assets [Line Items]          
Percentage of total leased properties 40.14%   40.14%   79.17%
Percentage of leased property revenue 30.41% 70.59% 49.78% 72.45%  
Grand Isle Gathering System [Member]          
Operating Leased Assets [Line Items]          
Percentage of total leased properties 50.07%   50.07%   0.00%
Percentage of leased property revenue 59.91% 0.00% 32.68% 0.00%  
Portland Terminal Facility [Member]          
Operating Leased Assets [Line Items]          
Percentage of total leased properties 9.52%   9.52%   17.24%
Percentage of leased property revenue 9.55% 20.53% 15.30% 18.44%  
Public Service Company of New Mexico [Member]          
Operating Leased Assets [Line Items]          
Percentage of total leased properties 0.00%   0.00%   3.07%
Percentage of leased property revenue 0.00% 8.88% 2.05% 9.11%