Quarterly report pursuant to Section 13 or 15(d)

Sale of Common Units Under Equity Distribution Agreement (Details)

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Sale of Common Units Under Equity Distribution Agreement (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2016
Mar. 31, 2018
Sale of Common Units Under Equity Distribution Agreement    
Maximum aggregate offering price of common limited partners units under an equity distribution agreement $ 250.0  
Remaining capacity to issue additional common units under an equity distribution agreement   $ 157.3