Quarterly report pursuant to Section 13 or 15(d)

Leased Properties and Leases - Additional Information (Details)

v3.8.0.1
Leased Properties and Leases - Additional Information (Details)
bbl / d in Thousands, bbl in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
a
bbl / d
facility
tank
leased_property
mi
bbl
Jun. 30, 2017
USD ($)
Sale Leaseback Transaction [Line Items]    
Number of significant leased properties | leased_property 3  
Minimum [Member]    
Sale Leaseback Transaction [Line Items]    
Initial Lease Term 11 years  
Maximum [Member]    
Sale Leaseback Transaction [Line Items]    
Initial Lease Term 15 years  
Grand Isle Gathering System [Member]    
Sale Leaseback Transaction [Line Items]    
Initial Lease Term 11 years  
Length of offshore pipeline (in miles) | mi 153  
Pipeline capacity (in bbl/day) | bbl / d 120  
Number of acres in the onshore terminal and saltwater disposal system (in acres) | a 16  
Renewal Option 9 years  
Renewal Term, percentage of remaining useful life 75.00%  
Current Monthly Rent Payments   $ 2,826,250
Current Monthly Rent Payments for July 2017 through June 2018 $ 2,854,667  
Initial Estimated Useful Life 27 years  
Pinedale Liquids Gathering System [Member]    
Sale Leaseback Transaction [Line Items]    
Initial Lease Term 15 years  
Length of offshore pipeline (in miles) | mi 150  
Number of storage facilities | facility 4  
Renewal Option 5 years  
Current Monthly Rent Payments $ 1,741,933  
Initial Estimated Useful Life 26 years  
Pinedale Liquids Gathering System [Member] | Prudential [Member] | Limited Partner [Member]    
Sale Leaseback Transaction [Line Items]    
Non controlling economic interest 18.95%  
Pinedale Liquids Gathering System [Member] | Pinedale GP [Member] | General Partner [Member]    
Sale Leaseback Transaction [Line Items]    
Controlling economic interest 81.05%  
Portland Terminal Facility [Member]    
Sale Leaseback Transaction [Line Items]    
Initial Lease Term 15 years  
Acres owned (in acres) | a 39  
Number of tanks | tank 84  
Crude oil and petroleum product storage capacity (in bbl) | bbl 1.5  
Renewal Option 5 years  
Current Monthly Rent Payments $ 513,355  
Initial Estimated Useful Life 30 years  
Exercise period of purchase option 90 days