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GOODWILL IMPAIRMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
GOODWILL IMPAIRMENT
Goodwill	$ 4,373	$ 136,399
Impairments of goodwill	132,026	0	$ 0
Hamilton mining complex
GOODWILL IMPAIRMENT
Goodwill		$ 132,000
Impairments of goodwill	$ 132,000

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

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.

+ References

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