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EQUITY INVESTMENTS - Narrative (Details) a in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) a	Dec. 31, 2019 USD ($)	May 17, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity investments	$ 0		$ 0	$ 24,816,000
Investment in Grizzly Oil Sands ULC | Athabasca Peace River And Cold Lake Oil Sands Regions
Schedule of Equity Method Investments [Line Items]
Gas and oil area, reserve (acres) | a	830
Investment in Grizzly Oil Sands ULC
Schedule of Equity Method Investments [Line Items]
Equity investment, ownership interest	24.50%
Amount of cash paid for equity investments		$ 0
Equity investments			$ 0	$ 24,816,000
Mammoth Energy Partners LP
Schedule of Equity Method Investments [Line Items]
Equity investment, ownership interest				21.50%
Equity investments				$ 0	$ 0

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