XML 64 R52.htm IDEA: XBRL DOCUMENT v3.7.0.1
Commitments and Contingencies Commitments and Contingencies - Take or Pay (Details) - Fractionation capacity [Member]
$ in Thousands
Jun. 30, 2017
USD ($)
Long-term Purchase Commitment [Line Items]  
Purchase Obligation, Remainder of the year $ 6,018
Purchase Obligation, Due in Second Year 10,060
Purchase Obligation, Due in Third Year 9,121
Purchase Obligation, Due in Fourth Year 8,451
Purchase Obligation, Due in Fifth Year 6,841
Purchase Obligation, Due after Fifth Year 9,099
Purchase Obligation $ 49,590