Net Income Per Limited Partner Unit - Reconciliation of Net Income (Loss) and Weighted-Average Units Used in Computing Basic and Diluted Net Income (Loss) Per Limited Partner Unit (Parenthetical) (Details) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share, amount	21,393	15,521