Earnings Per Common and Subordinated Unit (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Reconciliation of Weighted Average Units Table

	Year Ended December 31,
	2017	2016	2015
	Common Units	Common Units	Common Units
Number of weighted average units outstanding	35,035,428	33,262,376	33,169,413
Unit awards outstanding	—	—	—
Average diluted units outstanding	35,035,428	33,262,376	33,169,413