Quarterly report pursuant to Section 13 or 15(d)

Leased Properties - Grand Isle Gathering System (Details)

v3.4.0.3
Leased Properties - Grand Isle Gathering System (Details) - Grand Isle Gathering System [Member] - USD ($)
$ in Millions
3 Months Ended
Jun. 23, 2015
Mar. 31, 2016
Mar. 31, 2015
Sale Leaseback Transaction [Line Items]      
Estimated useful lives of assets 30 years    
Assets Leased to Others [Member]      
Sale Leaseback Transaction [Line Items]      
Depreciation   $ 2.1 $ 0.0