Net Income per BUC Narrative Tagging (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share Diluted [Line Items]
Weighted average number of units outstanding, diluted	60,182,264	60,252,928	59,431,010
Restricted Unit Awards [Member]
Earnings Per Share Diluted [Line Items]
Weighted average number of units outstanding, diluted	0	0	0