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Other Intangibles (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other Intangible Assets [Line Items]      
Accumulated Amortization $ (10,012) $ (8,949)  
Intangible assets, gross 25,494 25,469  
Intangible assets, net 15,482 16,520 [1]  
Rights-of-Way [Member]      
Other Intangible Assets [Line Items]      
Rights-of-way assets $ 13,267 $ 13,242  
Supply contracts [Member]      
Other Intangible Assets [Line Items]      
Estimated useful life (years) 11 years 6 months 11 years 6 months  
Intangible Assets, Gross $ 12,227 $ 12,227  
Accumulated Amortization (10,012) (8,949)  
Intangible assets, net 2,215 3,278  
Amortization expense 1,100 $ 1,100 $ 1,100
Amortization Expense, 2016 1,100    
Amortization Expense, 2017 1,100    
Amortization Expense, 2018 $ 100    
[1] Adjusted to include the historical balances of the Logistics Assets Predecessor. See Notes 1 and 3 for further discussion.