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VESSELS UNDER FINANCE LEASE, NET (Summary) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Finance lease, right-of-use asset, before accumulated depreciation, beginning balance	$ 777,939
Finance Lease, right-of-use asset, accumulated depreciation, beginning balance	80,559
Finance lease, right-of-use asset, after accumulated amortization, beginning balance	697,380
Depreciation	(60,392)	$ (55,298)
Finance lease, right-of-use asset, before accumulated depreciation, ending balance	777,939
Finance Lease, right-of-use asset, accumulated depreciation, ending balance	101,043
Finance lease, right-of-use asset, after accumulated amortization, ending balance	676,896
Vessels Under Finance Lease, Cost
Property, Plant and Equipment [Line Items]
Depreciation	0
Vessels Under Finance Lease, Accumulated Depreciation
Property, Plant and Equipment [Line Items]
Depreciation	(20,484)
Vessels Under Finance Lease, Net
Property, Plant and Equipment [Line Items]
Depreciation	$ (20,484)

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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X

- Definition

Amount, after accumulated amortization, of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

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X

- Definition

Amount of accumulated amortization of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

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- Definition

Amount, before accumulated amortization, of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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