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Other Intangibles (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other Intangible Assets [Line Items]      
Accumulated Amortization $ (7,885,000) $ (6,822,000)  
Intangible assets, gross 20,143,000 19,252,000  
Intangible assets, net 12,258,000 12,430,000 [1]  
Supply contracts [Member]
      
Other Intangible Assets [Line Items]      
Estimated useful life (years) 11 years 6 months    
Intangible Assets, Gross 12,227,000 12,227,000  
Accumulated Amortization (7,885,000) (6,822,000)  
Intangible assets, net 4,342,000 5,405,000  
Amortization of Intangible Assets 1,100,000 1,100,000 1,100,000
Amortization Expense, 2014 1,100,000    
Amortization Expense, 2015 1,100,000    
Amortization Expense, 2016 1,100,000    
Amortization Expense, 2017 1,100,000    
Rights-of-Way [Member]
      
Other Intangible Assets [Line Items]      
Rights-of-way assets $ 7,916,000 $ 7,025,000  
[1] Includes the historical balances of the Tyler Terminal and Tank Assets. See Notes 1 and 3 for further discussion.