RELATED PARTY TRANSACTIONS - Transactions with Hygo and Affiliates - Net Revenues (Details) - Hygo Energy Transition Ltd - USD ($) $ in Thousands	4 Months Ended	12 Months Ended
Apr. 15, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Net (expenses) income (due to) from related parties	$ 3,631	$ 10,887	$ 7,805
Management and administrative services revenue
Related Party Transaction [Line Items]
Revenue from related parties	2,051	5,281	5,904
Ship management fees income
Related Party Transaction [Line Items]
Revenue from related parties	904	1,780	1,210
Debt guarantee compensation
Related Party Transaction [Line Items]
Related party transaction amount	676	3,826	693
Other
Related Party Transaction [Line Items]
Related party transaction amount	$ 0	$ 0	(2)
Loan To Related Party
Related Party Transaction [Line Items]
Loan to related party			$ 7,000

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