Partners' Equity and Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Equity-based compensation expense recognized in the consolidated statements of operations and comprehensive income within "Selling, General and Administrative Expense" for the applicable periods was as follows:



	Years Ended December 31,
(In thousands)	2018			2017		2016
Awards Payable in Cash or Equity
Performance units	$	—		$	507	$	4,586
Deferred units	(266		)	627		993
Awards Payable in Equity
Performance units	5,413			8,822		7,519
Restricted units	5,830			4,612		3,856
Unit Options	—			—		5
Total equity-based compensation expense	$	10,977		$	14,568	$	16,959

Schedule of Share-based Compensation, Stock Options, Activity



(In thousands, except per unit amounts)	Unit Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
Options outstanding at December 31, 2017	374		$	34.55
Exercised	(6	)	36.95
Options outstanding at December 31, 2018	368		$	34.51
Options exercisable, end of year	368		$	34.51	3.8 years	$	4,707

Performance Units



(In thousands, except per unit amounts)	Number of Units		Weighted Average Grant Date Fair Value Per Unit
Unvested performance units at December 31, 2017	532		$	57.18
Granted ⁽¹⁾	122		$	52.56
Forfeited	(58	)	$	59.10
Vested	(217	)	$	54.63
Unvested performance units at December 31, 2018	379		$	56.86

(1) Includes 18 forfeitable distribution-equivalent units

Deferred Units



(In thousands, except per unit amounts)	Number of Units	Weighted Average Grant Date Fair Value Per Unit
Outstanding deferred units at December 31, 2017	44	$	55.41
Granted ⁽¹⁾	12	$	49.35
Forfeited	—	—
Vested	—	—
Outstanding deferred units at December 31, 2018	56	$	54.21

(1) Includes 3 distribution-equivalent units

Schedule of Nonvested Restricted Stock Units Activity

Restricted Units



(In thousands, except per unit amounts)	Number of Units		Weighted Average Grant Date Fair Value Per Unit
Unvested restricted units at December 31, 2017	252		$	59.75
Granted	130		$	53.62
Forfeited	(5	)	$	60.74
Vested	(67	)	$	56.59
Unvested restricted units at December 31, 2018	310		$	57.85