Partners' Equity and Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Partners' Capital Notes [Abstract]

Schedule of Share-based Compensation, Activity

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

	Years Ended December 31,
(In thousands)	2023		2022		2021 (1)
Awards Payable in Cash or Equity
Deferred units	$	473	$	(206)	$	1,014
Awards Payable in Equity
Performance units	12,963		12,787		10,554
Restricted units	9,548		7,613		4,878
Total equity-based compensation expense	$	22,984	$	20,194	$	16,446

(1)    Due to the effects of the COVID-19 pandemic on 2020 results, the 2018-2020 three-year performance plan was below the payout threshold. Given that two full years of the program were completed, the 2018-2020 performance unit awards were modified to allow for a payout taking into account 2018-2019 results, management's performance relative to 2020 COVID-19 strategic goals and 2020 pre-COVID-19 forecast, resulting in $3.9 million of additional expense recognized during the year ended December 31, 2021.

Schedule of Share-based Compensation, Stock Options, Activity

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, 2022	50	$	49.00
Granted (1)	13	$	40.83
Settled	(2)	$	39.85
Outstanding deferred units at December 31, 2023	61	$	47.52

(1)    Includes 1 forfeitable distribution-equivalent units

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, 2022	737	$	51.87
Granted (1)	269	$	44.06
Forfeited	(72)	$	46.97
Vested	—	$	—
Unvested performance units at December 31, 2023	934	$	50.00

(1)    Includes 27 forfeitable distribution-equivalent units

(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, 2022	91	$	36.95
Exercised	(91)	$	36.95
Options outstanding at December 31, 2023	—	$	—
Options exercisable, end of year	—	$	—	0.0 years	$	—

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, 2022	341	$	51.77
Granted	238	$	43.16
Forfeited	(10)	$	46.25
Vested	(144)	$	50.78
Unvested restricted units at December 31, 2023	425	$	47.41