EARNINGS PER UNIT (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net income (loss)	$ 8,988	$ 3,762
Net income (loss) attributable to limited partners	$ 5,056	4,698
Net loss attributable to noncontrolling interest		$ 1,881
Phantom Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU	44	126
Series A Preferred Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net income (loss) attributable to limited partners	$ (4,287)	$ (7,125)
Series A Preferred Units | Subsidiaries
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net income (loss) attributable to limited partners	(3,932)	(945)
Common units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net income (loss) attributable to limited partners	$ 769	$ (2,427)
Weighted-average common units outstanding – basic	6,125,000	3,021,000
Effect of nonvested phantom units	135
Weighted-average common units outstanding – diluted	6,260,000	3,021,000
Common unit – basic	$ 0.13	$ (0.80)
Common unit – diluted	$ 0.12	$ (0.80)