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RESTRICTED CASH (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2021	Jun. 30, 2021 Rate	Jun. 30, 2021 very_large_crude_carrier	Jun. 30, 2021 vessels	Dec. 31, 2020 USD ($) vessels
Restricted Cash and Cash Equivalents Items [Line Items]
Cash required to be maintained for covenant compliance	$ 102.8					$ 103.5
Cash required to be maintained for covenant compliance, percentage		100.00%	50.00%			100.00%
Finance lease, number of leased assets | vessels					2	2
Cash buffer per vessel, covenant compliance	2.0
Interest rate swap
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	1.1					$ 13.4
SFL
Restricted Cash and Cash Equivalents Items [Line Items]
Finance lease, number of leased assets | very_large_crude_carrier				2
Cash surplus required for vessel leasing agreements	$ 5.3					$ 15.6

X

- Definition

Amount of cash surplus required to be maintained per vessel as part of lease amendments

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1)(a))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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