Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Name:	us-gaap_GainLossOnDispositionOfAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

GAIN/(LOSS) ON SALE OF ASSETS AND TERMINATION OF CHARTERS (Narrative) (Details) $ in Millions	1 Months Ended	6 Months Ended
	Feb. 29, 2020 USD ($)	Jun. 30, 2021 vessel	Jun. 30, 2020 USD ($) vessel
Other Income And Expenses
Number of vessels sold		0
Gain recorded in relation to sale of vessels \| $			$ 2.3
Front Hakata
Other Income And Expenses
Number of vessels sold			1
Gain recorded in relation to sale of vessels \| $	$ 1.4
Sea Cheetah, Sea Jaguar, Sea Halibut, Sea Pike and Sea Leopard
Other Income And Expenses
Number of vessels sold			5