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Fair value of Above / Below Market Acquired Time Charters (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of fair value of above market time charters	$ 336	$ 0	$ 0
Amortization of fair value of below market time charters	2,349	1,820	$ 0
Accumulated amortization of fair value of below market time charters	$ 3,157
Weighted average remaining lease term	2 years 2 months 1 day
Below market time charters | Two Augustea Vessels
Finite-Lived Intangible Assets [Line Items]
Liability recognized	$ 5,373
Amortization of fair value of below market time charters	1,337	$ 1,820
Below market time charters | Star Marianne
Finite-Lived Intangible Assets [Line Items]
Liability recognized	1,269
Amortization of fair value of below market time charters	1,012
Above market time charters | Star Janni
Finite-Lived Intangible Assets [Line Items]
Asset recognized	336
Amortization of fair value of above market time charters	$ 336

X

- Definition

Amount of acquired leases at above market lease rate with a finite life.

+ References

No definition available.

+ Details

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- Definition

Amount of non-cash amortization of intangible asset (liability) for above and below market leases.

+ References

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=118932676&loc=d3e3602-108585

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- Definition

Amount of amortization of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

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- Definition

Amount of accumulated amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

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- Definition

Amount of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

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- Definition

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
-URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980

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