ACQUISITIONS - Narrative (Details) $ in Thousands, bbl in Millions	1 Months Ended
	Sep. 30, 2017 USD ($)	Jan. 31, 2017 USD ($) continent terminal bbl	Aug. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Goodwill	$ 1,004,545			$ 1,004,545
Indianola Pipeline
Business Acquisition [Line Items]
Consideration for business acquisition			$ 26,000
Goodwill			$ 7,758
VTTI Acquisition
Business Acquisition [Line Items]
Percentage of interest acquired		50.00%
Cash consideration		$ 1,150,000
VTTI MLP
Business Acquisition [Line Items]
Percentage of cash consideration	50.00%
VTTI B.V.
Business Acquisition [Line Items]
Product storage capacity (in bbl) | bbl		58
Number of terminals | terminal		15
Number of continents | continent		5
Proceeds from capital contribution	$ 236,800
VTTI B.V. | VTTI MLP
Business Acquisition [Line Items]
Cash consideration	$ 473,600
VTTI B.V.
Business Acquisition [Line Items]
Excess net investment		$ 583,300
Excess fair value of PPE and intangible assets		$ 233,000
Useful life of assets		28 years
Goodwill		$ 350,300