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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Recognizable events No recognizable events occurred subsequent to March 31, 2018. Non-recognizable events Cash Distribution. In April 2018, our general partner’s board of directors declared a quarterly distribution of $0.9375 per unit for the period of January 1, 2018 through March 31, 2018. This quarterly cash distribution will be paid on May 15, 2018 to unitholders of record on May 8, 2018. The total cash distributions expected to be paid under this declaration are approximately $213.9 million.