Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

ORGANIZATION AND OPERATIONS Narrative 1 - Goodwill Impairment (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Oct. 01, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unusual or Infrequent Item, or Both [Line Items]
Goodwill impairment loss	$ 0		$ 225,000	$ 0	$ 0
Crude Oil Pipelines \| Pipeline Segment
Unusual or Infrequent Item, or Both [Line Items]
Goodwill impairment loss		$ 225,000	$ 225,000