VESSELS (Details) (USD $)	6 Months Ended
Jun. 30, 2013 Vessel	Jun. 30, 2012
VESSELS [Abstract]
Total number of vessels	20
Residual value	$ 4,000,000
Estimated useful life	25 years
Dry-docking charges	$ 4,773,000	$ 5,904,000

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