Annual report pursuant to Section 13 and 15(d)

Leased Properties - Grand Isle Gathering System (Details)

v3.3.1.900
Leased Properties - Grand Isle Gathering System (Details)
 3 Months Ended 12 Months Ended
Jun. 23, 2015
USD ($)
a
oil_field
well
tanks
mi
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
Mar. 31, 2015
bbl
Sale Leaseback Transaction [Line Items]              
Shares of common stock offered | shares 2,587,500 11,939,697 9,321,010 11,939,697 9,321,010    
Net offering proceeds on common stock $ 73,300,000     $ 73,184,679 $ 141,797,913 $ (523,094)  
Net proceeds of convertible debt 111,300,000     111,262,500 0 0  
Advances on revolving line of credit       $ 45,392,332 $ 34,676,948 $ 221,332  
Senior Credit Facility [Member]              
Sale Leaseback Transaction [Line Items]              
Advances on revolving line of credit $ 42,000,000            
Grand Isle Gathering System [Member]              
Sale Leaseback Transaction [Line Items]              
Length of offshore pipeline | mi 153            
Number of producing oil fields | oil_field 7            
Number of acres in the onshore terminal and saltwater disposal system | a 16            
Number of storage tanks | tanks 4            
Number of injection wells | well 3            
Volume of fluid GIGS transported | bbl             60,000
Volume of oil GIGS transported | bbl             18,000
Volume of water GIGS transported | bbl             42,000
Total capacity GIGS can transport, volume | bbl             120,000
Estimated useful lives of assets 30 years            
Grand Isle Gathering System [Member] | Energy XXI GIGS Services, LLC [Member]              
Sale Leaseback Transaction [Line Items]              
Number of producing oil fields | oil_field 6            
Grand Isle Gathering System [Member] | ExxonMobil [Member]              
Sale Leaseback Transaction [Line Items]              
Number of producing oil fields | oil_field 1            
Assets Leased to Others [Member] | Grand Isle Gathering System [Member]              
Sale Leaseback Transaction [Line Items]              
Depreciation   $ 4,300,000 $ 0        
Grand Isle Gathering System [Member] | Grand Isle Corridor, LP [Member]              
Sale Leaseback Transaction [Line Items]              
Cash portion of consideration $ 245,000,000            
Liabilities assumed in acquisition 12,500,000            
Asset acquisition costs 1,900,000            
Deferred leasing costs 336,000            
Total consideration $ 259,800,000