Recent Accounting Pronouncements and Significant Accounting Policies, Vessel Depreciation (Details)	12 Months Ended
Dec. 31, 2021 USD ($)
Tanker Vessels [Member]
Vessel Depreciation [Abstract]
Estimated residual scrap rate per light-weight ton	$ 350
Estimated useful life	25 years
Container Vessels [Member]
Vessel Depreciation [Abstract]
Estimated residual scrap rate per light-weight ton	$ 350
Estimated useful life	30 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration