Unit Based Awards (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of compensation costs related to unit based plan

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

	For the Year Ended December 31,
	2019		2018		2017
Employees	$	1,226	$	1,098	$	534
Non-employee directors	198		126		116
Total unit-based compensation expense	$	1,424	$	1,224	$	650

Summary of restricted unit activity

A summary of the restricted unit activity for the year ended December 31, 2019 is provided below:

	Number of Units			Weighted Average Grant-Date Fair Value Per Unit
Non-vested, beginning of year	624,125			$	13.78
Granted (TBRU)	16,944			$	12.45
Vested	(107,762		)	$	13.82
Forfeited	(154,288		)	$	13.90
Non-Vested, end of year	379,019			$	13.91
Aggregate intrinsic value, end of year	$	1,527

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 years ended December 31, 2019, 2018 and 2017 is provided below:

	For the Year Ended December 31,
	2019		2018		2017
Aggregate intrinsic value of units vested	$	1,351	$	1,195	$	143
Fair value of units vested	$	1,551	$	2,250	$	208