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TRANSACTIONS WITH RELATED PARTIES - Narrative (Details) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2021 USD ($) barrel railcar shares	Jan. 31, 2019 railcar	Jun. 30, 2021 USD ($) barrel railcar shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2021 USD ($) barrel railcar shares	Jun. 30, 2020 USD ($) shares	Sep. 30, 2020	Mar. 31, 2021 shares	Dec. 31, 2020 USD ($) shares	Mar. 31, 2020 shares	Dec. 31, 2019 shares
Related Party Transaction [Line Items]
Amount of transloading capacity per day per unit train \| railcar	120		120		120
Number of barrels of takeaway capacity per day \| barrel	112,500		112,500		112,500
Selling, general and administrative costs			$ 4,036	$ 4,455	$ 8,769	$ 9,628
Accounts payable and accrued expenses — related party	$ 348		348		348				$ 383
Contract asset	2,600		2,600		2,600
Percentage of control of terminal capacity							25.00%
Related party
Related Party Transaction [Line Items]
Selling, general and administrative costs			1,625	1,835	3,302	3,828
USDG \| Omnibus Agreement \| Limited Partner
Related Party Transaction [Line Items]
Selling, general and administrative costs			1,600	$ 1,800	3,300	3,800
Accounts payable and accrued expenses — related party	$ 300		300		300
USDCF \| Marketing Services Agreement \| Subsidiaries
Related Party Transaction [Line Items]
Agreement term	5 years
USD Terminal Canada II \| Hardisty Terminal Services Agreement \| Related party
Related Party Transaction [Line Items]
Operating and maintenance			$ 2,100		$ 4,200	$ 4,100
Contract asset									$ 1,700
USDM \| Marketing Services Agreement \| Subsidiaries
Related Party Transaction [Line Items]
Agreement term		6 months
Automatic renewal period		6 months
Number of railcars leased \| railcar		200
USDG \| Limited Partner \| USD PARTNERS LP
Related Party Transaction [Line Items]
Limited partner interest (in percentage)					41.70%
USD Partners GP LLC \| General Partner \| USD PARTNERS LP
Related Party Transaction [Line Items]
General partner interest (in percentage)					1.70%
General Partner
Related Party Transaction [Line Items]
Partners' capital account (in units) (in shares) \| shares	461,136		461,136	461,136	461,136	461,136		461,136	461,136	461,136	461,136
General Partner \| USD Partners GP LLC
Related Party Transaction [Line Items]
Partners' capital account (in units) (in shares) \| shares	461,136		461,136		461,136
General Partner \| USD Partners GP LLC \| USD PARTNERS LP
Related Party Transaction [Line Items]
General partner interest (in percentage)					2.00%
Common Units \| Limited Partner
Related Party Transaction [Line Items]
Partners' capital account (in units) (in shares) \| shares	27,224,441		27,224,441	26,843,674	27,224,441	26,843,674		27,224,441	26,844,715	26,843,674	24,411,892
Common Units \| Limited Partner \| USDG
Related Party Transaction [Line Items]
Partners' capital account (in units) (in shares) \| shares	11,557,090		11,557,090		11,557,090
Units pledged as collateral (in units) (in shares) \| shares	10,000,000.0		10,000,000.0		10,000,000.0