Equity-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2021

Retirement Benefits [Abstract]

Schedule of Service-Based And Performance-Based Awards

A summary of our phantom unit activity for our service-based awards to our directors is set forth below:

	Service-Based Awards
	Number of Phantom Units	Average Grant Date Fair Value		Total Value (in thousands)
Unvested at December 31, 2020	165,662	$	11.19	$	1,853
Granted	71,340	$	8.83	630
Settled	(28,484)	$	9.05	(258)
Unvested at December 31, 2021	208,518	$	10.67	$	2,225

Schedule of Equity-Based Compensation Expense

Equity-based compensation expense (credit) during the three years ended December 31, 2021 was as follows:

	Expense (Credit) Related to Equity-Based Compensation Plans
Consolidated Statements of Operations	2021		2020		2019
Onshore facilities and transportation operating costs	$	—	$	(209)	$	250
Marine transportation operating costs	—		(51)		173
Sodium minerals and sulfur services operating costs	—		(115)		140
Offshore pipeline operating costs	—		(277)		269
General and administrative expenses	1,416		(333)		1,087
Total	$	1,416	$	(985)	$	1,919