SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
derivative_instrument
$ / shares
Sep. 30, 2015
$ / shares
Dec. 31, 2015
USD ($)
customer
renewal_option
derivative_instrument
reporting_unit
portfolio
Dec. 31, 2014
USD ($)
customer
portfolio
Dec. 31, 2013
USD ($)
customer
Restricted Cash          
Restricted cash $ 21,610,000   $ 21,610,000 $ 21,084,000  
Capitalized Interest          
Capitalized interest     2,128,000 3,534,000 $ 0
Repairs and Maintenance [Abstract]          
Repair and maintenance costs     3,643,000 235,000 712,000
Goodwill          
Goodwill 116,584,000   $ 116,584,000 116,584,000  
Number of reporting units subject to impairment assessment | reporting_unit     2    
Goodwill impairment 0   $ 0 0  
Deferred Financing Costs          
Unamortized deferred financing costs 4,836,000   4,836,000 4,919,000  
Amortization expense     $ 1,469,000 $ 576,000 125,000
Revenue Recognition          
Number of shipping container portfolios subject to finance leases | portfolio     2 2,000  
Provision for Doubtful Accounts          
Provision for doubtful accounts 392,000   $ 392,000 $ 111,000  
Bad debt expense     676,000 281,000 0
Comprehensive Income (Loss)          
Reclassification adjustments impacting accumulated other comprehensive income     131,000 171,000 $ 98,000
Derivative Financial Instruments          
Derivative liability 0   0 0  
Estimated net gains/losses reclassified from AOCI into earnings within next 12 months $ (5,000)   (5,000)    
Distributions and Dividends          
Cash dividends declared (in dollars per share) | $ / shares $ 0.33 $ 0.15      
Other Assets          
Derivative Financial Instruments          
Derivative assets $ 101,000   $ 101,000 $ 232,000  
Designated as Hedging Instrument          
Derivative Financial Instruments          
Number of derivatives | derivative_instrument 1   1    
Not Designated as Hedging Instrument          
Derivative Financial Instruments          
Number of derivatives | derivative_instrument 1   1    
One Major Revenue Customer | Customer Concentration Risk | Sales Revenue          
Concentration of Credit Risk          
Concentration risk percentage     21.00%    
One Major Revenue Customer | Customer Concentration Risk | Sales Revenue | Reportable Subsegments | Equipment Leasing | Offshore Energy | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer     1    
One Major Revenue Customer | Customer Concentration Risk | Sales Revenue | Reportable Subsegments | Infrastructure | Jefferson Terminal | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer     1    
Three Major Revenue Customers | Customer Concentration Risk | Sales Revenue          
Concentration of Credit Risk          
Concentration risk percentage       39.00% 70.00%
Three Major Revenue Customers | Customer Concentration Risk | Sales Revenue | Reportable Subsegments | Equipment Leasing | Offshore Energy | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer       1 1
Three Major Revenue Customers | Customer Concentration Risk | Sales Revenue | Reportable Subsegments | Equipment Leasing | Aviation Leasing | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer       1 1
Three Major Revenue Customers | Customer Concentration Risk | Sales Revenue | Reportable Subsegments | Equipment Leasing | Shipping Containers | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer       1 1
Two Major Accounts Receivable Customers | Customer Concentration Risk | Accounts Receivable | Reportable Subsegments | Equipment Leasing | Offshore Energy | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer     2    
One Major Accounts Receivable Customer | Customer Concentration Risk | Accounts Receivable          
Concentration of Credit Risk          
Concentration risk percentage       11.70%  
One Major Accounts Receivable Customer | Customer Concentration Risk | Accounts Receivable | Reportable Subsegments | Equipment Leasing | Offshore Energy | Operating Segments          
Concentration of Credit Risk          
Number of customers | customer       1  
Major Accounts Receivable Customer, Customer One | Customer Concentration Risk | Accounts Receivable          
Concentration of Credit Risk          
Concentration risk percentage     27.10%    
Major Accounts Receivable Customer, Customer Two | Customer Concentration Risk | Accounts Receivable          
Concentration of Credit Risk          
Concentration risk percentage     25.40%    
Customer Relationships          
Intangibles and amortization          
Number of renewal options | renewal_option     2    
Renewal term     1 year    
Minimum          
Property, Plant and Equipment [Abstract]          
Amortization period of capitalized repairs and maintenance costs     30 months    
Intangibles and amortization          
Amortization over remaining lease terms     6 months    
Minimum | Off-Market Favorable Lease          
Intangibles and amortization          
Amortization over remaining lease terms     6 months    
Minimum | Customer Relationships          
Intangibles and amortization          
Useful life of intangible assets     5 years    
Maximum          
Property, Plant and Equipment [Abstract]          
Amortization period of capitalized repairs and maintenance costs     60 months    
Intangibles and amortization          
Amortization over remaining lease terms     52 months    
Maximum | Off-Market Favorable Lease          
Intangibles and amortization          
Amortization over remaining lease terms     52 months    
Maximum | Customer Relationships          
Intangibles and amortization          
Useful life of intangible assets     10 years    
Passenger aircraft          
Property, Plant and Equipment [Abstract]          
Useful life     25 years    
Percentage of manufacturer price     15.00%    
Aircraft engines | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     2 years    
Aircraft engines | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     6 years    
Offshore energy vessels          
Property, Plant and Equipment [Abstract]          
Useful life     25 years    
Percentage of new build cost     20.00%    
Railcars and locomotives | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     40 years    
Railcars and locomotives | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     50 years    
Track and track related assets | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     15 years    
Track and track related assets | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     50 years    
Buildings and site improvements | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     20 years    
Buildings and site improvements | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     30 years    
Railroad equipment | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     3 years    
Railroad equipment | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     15 years    
Crude oil terminal machinery and equipment | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     15 years    
Crude oil terminal machinery and equipment | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     25 years    
Vehicles | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     5 years    
Vehicles | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     7 years    
Furniture and fixtures | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     3 years    
Furniture and fixtures | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     6 years    
Computer hardware and software | Minimum          
Property, Plant and Equipment [Abstract]          
Useful life     3 years    
Computer hardware and software | Maximum          
Property, Plant and Equipment [Abstract]          
Useful life     5 years    
Co-venturer          
Variable Interest Entities          
Subsidiary loan to VIE partner for equity contribution       $ 3,725,000  
Subsidiaries | Co-venturer          
Variable Interest Entities          
Subsidiary loan to VIE partner for equity contribution $ 3,725,000   $ 3,725,000    
Jefferson Terminal | Bonds payable | Series 2010 Bonds          
Tendered Bonds          
Debt face amount 300,000,000   300,000,000    
MT6015          
Variable Interest Entities          
Total assets $ 7,533,000   7,533,000 $ 7,450,000  
MT6015 | MT6015          
Variable Interest Entities          
Vessel purchase commitment     $ 75,000,000    
MT6015 | Third-Party Owner          
Variable Interest Entities          
Interest held in VIE, as a percentage     50.00%    
MT6015 | Subsidiaries          
Variable Interest Entities          
Interest held in VIE, as a percentage     50.00%    
Goodwill          
Goodwill          
Hypothetical decline in fair value of reporting unit, no result in goodwill impairment     5.00%