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INVESTMENTS IN DIRECT FINANCING LEASES (Details)
 1 Months Ended 6 Months Ended
Jul. 31, 2016
Jun. 30, 2016
vessels
vessel
Rate
Jul. 01, 2016
Rate
Feb. 29, 2016
vessel
Dec. 31, 2015
vessels
vessel
Net Investment in Direct Financing and Sales Type Leases [Abstract]          
Number of VLCCs   12      
Number of Suezmax crude oil carriers   2      
Term of charters, minimum (in years)   4 years      
Term of charters, maximum (in years)   11 years      
Number of offshore supply vessels chartered on long-term bareboat charters | vessel   1      
Term of lease or charter   15 years      
Related Party Transaction [Line Items]          
Assets accounted for as direct financing leases and leased to related parties   15     16
Deep Sea [Member]          
Net Investment in Direct Financing and Sales Type Leases [Abstract]          
Joint Venture, Ownership Percentage | Rate   50.00%      
Related Party Transaction [Line Items]          
Assets accounted for as direct financing leases and leased to related parties | vessel   1   1 1
Subsequent Event [Member] | Deep Sea [Member]          
Net Investment in Direct Financing and Sales Type Leases [Abstract]          
Term of lease or charter 3 years        
Related Party Transaction [Line Items]          
Profit sharing percentage | Rate     50.00%