Equity-Based Awards (Tables)

3 Months Ended

Mar. 31, 2018

Affiliate Grants

Equity-Based Awards

Schedule of phantom unit awards

	Time-Based			Performance-Based			Total Affiliate Grant
	Phantom Units			PhantomUnits			PhantomUnits
		Weighted-			Weighted-			Weighted-
		Average			Average			Average
		Grant Date			Grant Date			Grant Date
		Fair Value			Fair Value			Fair Value
	Units	(per unit)(1)		Units	(per unit)(1)		Units	(per unit)(1)
Nonvested December 31, 2017	595,866	$	22.32	111,104	$	25.52	706,970	$	22.82
Granted	243,442	$	28.65	116,401	$	28.65	359,843	$	28.65
Forfeitures	(16,123)	$	23.76	—	$	—	(16,123)	$	23.76
Vested	—	$	—	—	$	—	—	$	—
Nonvested March 31, 2018	823,185	$	24.16	227,505	$	27.12	1,050,690	$	24.80

(1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.

Director Grants

Equity-Based Awards

Schedule of phantom unit awards

	Time-Based			Performance-Based			Total Director Grant
	Phantom Units			Phantom Units			Phantom Units
		Weighted-			Weighted-			Weighted-
		Average			Average			Average
		Grant Date			Grant Date			Grant Date
		Fair Value			Fair Value			Fair Value
	Units	(per unit)(1)		Units	(per unit)(1)		Units	(per unit)(1)
Nonvested December 31, 2017	15,840	$	25.25	—	$	—	15,840	$	25.25
Granted	13,964	$	28.65	—	$	—	13,964	$	28.65
Forfeitures	—	$	—	—	$	—	—	$	—
Vested	(15,840)	$	25.25	—	$	—	(15,840)	$	25.25
Nonvested March 31, 2018	13,964	$	28.65	—	$	—	13,964	$	28.65

(1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.