Unit Based Awards (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Costs Related to Unit Based Plan

Amounts recognized in selling, general, and administrative expense in the consolidated and condensed financial statements with respect to these plans are as follows:

	Three Months Ended March 31,
	2019		2018
Employees	$	329	$	96
Non-employee directors	23		36
Total unit-based compensation expense	$	352	$	132

Summary of Restricted Unit Activity

A summary of the restricted unit activity for the three months ended March 31, 2019 is provided below:

	Number of Units			Weighted Average Grant-Date Fair Value Per Unit
Non-vested, beginning of period	624,125			$	13.78
Granted (TBRU)	16,944			$	12.45
Vested	(107,762		)	$	13.82
Forfeited	(118,087		)	$	13.90
Non-Vested, end of period	415,220			$	13.77
Aggregate intrinsic value, end of period	$	5,169

Summary of Aggregate Intrinsic Value and Fair Value of Units Vested

A summary of the restricted units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) during the three months ended March 31, 2019 and 2018 is provided below:

	Three Months Ended March 31,
	2019		2018
Aggregate intrinsic value of units vested	$	1,351	$	1,188
Fair value of units vested	1,551		2,232