Annual report pursuant to Section 13 and 15(d)

Credit Facilities (Details)

v3.6.0.2
Credit Facilities (Details)
 12 Months Ended
Mar. 30, 2016
USD ($)
Instrument
Jul. 31, 2015
USD ($)
Jul. 08, 2015
USD ($)
Nov. 24, 2014
USD ($)
Mar. 07, 2014
USD ($)
Dec. 20, 2012
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Mar. 31, 2016
USD ($)
Instrument
Sep. 26, 2014
USD ($)
Feb. 28, 2013
USD ($)
Line of Credit Facility [Line Items]                      
Secured credit facilities, net             $ 89,387,985 $ 105,440,842      
Total Assets             650,732,571 677,979,621      
Key Bank [Member] | Secured Debt [Member]                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity           $ 70,000,000         $ 70,000,000
Basis spread on variable rate 1.00%                    
Principal payments made through extension period             $ 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%            
Regions [Member] | Revolving Credit Facility [Member]                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity       $ 90,000,000           $ 30,000,000  
LIBOR [Member]                      
Line of Credit Facility [Line Items]                      
Basis spread on variable rate       3.50%              
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]                      
Line of Credit Facility [Line Items]                      
Basis spread on variable rate       3.50%              
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]                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity     $ 153,000,000                
Line of Credit [Member] | Revolving Credit Facility [Member]                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity     $ 105,000,000       $ 93,000,000        
Monthly principal periodic payment             1,600,000 $ 900,000      
Line of Credit [Member] | Revolving Credit Facility [Member] | Mowood/Omega Revolver [Member]                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity   $ 1,500,000.0                  
Basis spread on variable rate   4.00%                  
Line of Credit [Member] | Maximum [Member] | LIBOR [Member] | Revolving Credit Facility [Member]                      
Line of Credit Facility [Line Items]                      
Basis spread on variable rate     3.75%                
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]                      
Secured credit facilities, net $ 58,500,000                    
Cash sweep provision distribution             9,100,000        
Total Assets             $ 144,300,000        
Cash Flow Hedging [Member]                      
Line of Credit Facility [Line Items]                      
Number of instruments terminated | Instrument 1                    
Interest Rate Swap [Member]                      
Line of Credit Facility [Line Items]                      
Number of instruments terminated | Instrument                 1    
Cash flow hedge terminated                 $ 26,300,000    
Interest Rate Swap [Member] | Cash Flow Hedging [Member]                      
Line of Credit Facility [Line Items]                      
Number of instruments terminated | Instrument 1                    
Cash flow hedge terminated $ 26,300,000                    
Mogas [Member] | Regions [Member] | Revolving Credit Facility [Member]                      
Line of Credit Facility [Line Items]                      
Maximum borrowing capacity       $ 3,000,000.0