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DISCONTINUED OPERATIONS AND DIVESTITURES - Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disposal Group, Including Discontinued Operation, Income Statement Disclosures
Income (loss) from discontinued operations, net of income taxes	$ 0	$ 0	$ (179,466)
Natural Gas Storage Assets | Discontinued Operations, Disposed of by Sale
Disposal Group, Including Discontinued Operation, Income Statement Disclosures
Total revenues			22,836
Total costs and expenses and other, net, excluding depreciation and amortization			(15,360)
Depreciation and amortization			(8,161)
Other operating loss, net			(178,781)
Other, net			0
Income (loss) from discontinued operations before income taxes			(179,466)
Income tax expense			0
Income (loss) from discontinued operations, net of income taxes			(179,466)
Gain on disposition			$ 178,781

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