For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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GOODWILL AND IMPAIRMENT CHARGES (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill [Line Items]
Goodwill impairment charges	$ 55,837	$ 0		$ 55,837	$ 191,788
Goodwill	34,181			$ 34,181		$ 91,351
Sales Revenue, Net \| Customer Concentration Risk \| Oil and Gas, Refining and Marketing
Goodwill [Line Items]
Concentration risk, percentage				40.00%
IHT
Goodwill [Line Items]
Goodwill impairment charges			$ 191,800
Goodwill	$ 0			$ 0		$ 0