LONG-TERM INCENTIVE AND RETIREMENT PLANS (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Set Forth Unit Appreciation Right Award Activity

The following table sets forth the UAR award activity for the years ended December 31, 2018 and 2017, respectively:

	Years Ended December 31,
	2018			2017
Outstanding, beginning of period		58,646			66,355
Granted		—			—
Exercised		—			—
Forfeited		(43,646	)		(7,709	)
Outstanding, end of period (1)		15,000			58,646
Exercisable, end of period		15,000			57,081

2018 Plan

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Long-Term Incentive Plan Activity

The following table sets forth the 2018 LTIP phantom unit award activity for the years ended December 31, 2018 and 2017, respectively:

	Years Ended December 31,
	2018			2017
Outstanding, beginning of period		108,602			117,630
Granted (1)		354,104			41,732
Settled in common units or cash (1)		(709	)		(16,098	)
Forfeiture		(87,536	)
Performance vesting forfeiture		(29,512	)		(34,662	)
Outstanding, end of period (2)		344,949			108,602

(1) The weighted-average grant date fair value for the unit awards on the date of grant was $6.72 and $8.11 for the years ended December 31, 2018 and 2017, respectively. The intrinsic values of unit awards vested during the years ended December 31, 2018 and 2017 were $2.4 million and $0.4 million, respectively.

(2) Based on the closing price of the common units on December 31, 2018, the estimated intrinsic value of the outstanding unit awards was $2.4 million at December 31, 2018.

The following table sets forth the 2018 LTIP restricted unit award activity for the years ended December 31, 2018 and 2017, respectively:

	Years Ended December 31,
	2018		2017
Outstanding, beginning of period		—		—
Granted (1)		780,949		—
Settled in common units or cash (1)		—		—
Performance vesting forfeiture		—		—
Outstanding, end of period (2)		780,949		—

(1) The weighted-average grant date fair value for the unit awards on the date of grant was $3.98 for the year ended December 31, 2018.

2004 Plan

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Long-Term Incentive Plan Activity

The following table sets forth the 2004 LTIP activity related to DERs credited as phantom units to the participant’s accounts for the years ended December 31, 2018 and 2017, respectively:

	Years Ended December 31,
	2018		2017
Outstanding, beginning of period		219,306		205,510
Granted (1)		—		13,796
Settled in common units or cash		—		—
Outstanding, end of period (2)		219,306		219,306

(1) The weighted-average grant date fair value for the phantom unit awards on the date of grant was $9.70 for the year ended December 31, 2017.

(2) Based on the closing price of the common units on December 31, 2018, the estimated intrinsic value of the outstanding restricted phantom units was $0.5 million.