LEASES - Lessor Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Accumulated depreciation	$ 35.1	$ 13.8
Marina Energy LLC \| Assets Leased to Others
Lessor, Lease, Description [Line Items]
Carrying costs of property and equipment under operating lease, net of accumulated depreciation		68.9
Accumulated depreciation		$ 40.6

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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