Quarterly report pursuant to Section 13 or 15(d)

Credit Facilities (Details)

v3.5.0.2
Credit Facilities (Details) - USD ($)
 3 Months Ended 9 Months Ended
Mar. 30, 2016
Dec. 20, 2012
Sep. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Line of Credit Facility [Line Items]            
Borrowed against the revolver       $ 44,000,000 $ 45,392,332  
Principal balance     $ 91,698,387 91,698,387   $ 105,440,842
Total Assets     657,939,190 657,939,190   $ 677,979,621
Pinedale Liquids Gathering System [Member]            
Line of Credit Facility [Line Items]            
Total Assets     $ 142,600,000 142,600,000    
Key Bank [Member] | Secured Debt [Member]            
Line of Credit Facility [Line Items]            
Loan facility secured by assets   $ 70,000,000        
Maximum borrowing capacity   $ 70,000,000        
Basis spread on variable rate 1.00%          
Line of Credit Facility, Periodic Payment Through Extension Period, Principal       3,200,000    
Key Bank [Member] | Secured Debt [Member] | Pinedale Liquids Gathering System [Member]            
Line of Credit Facility [Line Items]            
Monthly principal periodic payment       $ 294,000    
Required principle payment as percentage of outstanding amount, beginning in year two     0.42% 0.42%    
LIBOR [Member] | Key Bank [Member] | Secured Debt [Member]            
Line of Credit Facility [Line Items]            
Basis spread on variable rate   3.25%   4.25%    
Maximum [Member] | LIBOR [Member] | Key Bank [Member] | Secured Debt [Member]            
Line of Credit Facility [Line Items]            
Basis spread on variable rate 7.00%          
Line of Credit [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility [Line Items]            
Borrowed against the revolver $ 44,000,000          
Available borrowing capacity     $ 53,300,000 $ 53,300,000    
Pinedale Liquids Gathering System [Member]            
Line of Credit Facility [Line Items]            
Non controlling economic interest pinedale GP 81.05%          
Value of economic interest $ 47,400,000          
Pinedale Liquids Gathering System [Member] | Key Bank [Member] | Secured Debt [Member]            
Line of Credit Facility [Line Items]            
Principal balance 58,500,000          
Cash sweep provision distribution     $ 3,100,000 $ 6,200,000    
Interest Rate Swap [Member] | Cash Flow Hedging [Member]            
Line of Credit Facility [Line Items]            
Cash flow hedge terminated $ 26,300,000