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Related Party Transactions	6 Months Ended
Related Party Transactions	Jun. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Stacy P. Methvin is an independent member of our general partner’s board of directors and is also a director of one of our customers. We received tariff revenue from this customer of $4.7 million and $4.3 million for the three months ended June 30, 2016 and 2017, respectively, and $7.7 million and $8.4 million for the six months ended June 30, 2016 and 2017, respectively. We recorded receivables of $1.4 million from this customer at both December 31, 2016 and June 30, 2017. The tariff revenue we recognized from this customer was in the normal course of business, with rates determined in accordance with published tariffs. See Note 4 – Investments in Non-Controlled Entities for a discussion of transactions with our joint ventures.