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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend Declaration On February 13, 2019, our Board of Trustees declared a cash distribution of $0.3175 per common share and Common Unit for the first quarter of 2019. This distribution is expected to be paid on or about March 29, 2019 to common shareholders and Common Unit holders of record as of March 22, 2019.