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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Recognizable events No recognizable events have occurred subsequent to December 31, 2017. Non-recognizable events On January 31, 2018, we issued 170,604 limited partner units, of which 168,913 were issued to settle unit awards to certain employees that vested on December 31, 2017 and 1,691 were issued to settle the equity-based retainer paid to one independent director of our general partner. On February 1, 2018, 294,054 unit awards were granted pursuant to our LTIP. These awards included both performance-based and time-based awards and have a 3-year vesting period that will end on December 31, 2020. On February 14, 2018, we paid cash distributions of $0.92 per unit on our outstanding limited partner units to unitholders of record at the close of business on February 6, 2018. The total distributions paid were $209.9 million.