SEGMENT INFORMATION - Summary of Geographic Sources of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]                      
Total revenues $ 33,798 $ 35,233 $ 33,564 $ 33,973 $ 23,419 $ 16,080 $ 10,735 $ 7,696 $ 136,568 $ 57,930 $ 19,530
Equipment Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 92,743 43,984 19,530
Infrastructure                      
Segment Reporting Information [Line Items]                      
Total revenues                 43,825 13,946 0
Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 61,330 20,958 6,645
Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Total revenues                 24,231 14,630 5,264
Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Total revenues                 7,182 8,396 7,621
Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Total revenues                 18,275 3,977 0
Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Total revenues                 25,550 9,969 0
Corporate                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Africa                      
Segment Reporting Information [Line Items]                      
Total revenues                 10,969 7,818 654
Africa | Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 10,969 7,818 654
Africa | Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Africa | Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Africa | Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Africa | Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Africa | Corporate                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Asia                      
Segment Reporting Information [Line Items]                      
Total revenues                 39,960 16,753 13,381
Asia | Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 27,168 3,246 1,714
Asia | Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Total revenues                 7,483 7,483 5,002
Asia | Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Total revenues                 5,309 6,024 6,665
Asia | Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Asia | Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Asia | Corporate                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Europe                      
Segment Reporting Information [Line Items]                      
Total revenues                 35,079 13,672 3,319
Europe | Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 20,008 8,240 3,319
Europe | Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Total revenues                 15,071 5,432 0
Europe | Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Europe | Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Europe | Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Europe | Corporate                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
North America                      
Segment Reporting Information [Line Items]                      
Total revenues                 49,679 19,594 2,176
North America | Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 2,304 1,561 958
North America | Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Total revenues                 1,677 1,715 262
North America | Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Total revenues                 1,873 2,372 956
North America | Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Total revenues                 18,275 3,977 0
North America | Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Total revenues                 25,550 9,969 0
North America | Corporate                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 $ 0
South America                      
Segment Reporting Information [Line Items]                      
Total revenues                 881 93  
South America | Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Total revenues                 881 93  
South America | Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0  
South America | Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0  
South America | Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0  
South America | Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0  
South America | Corporate                      
Segment Reporting Information [Line Items]                      
Total revenues                 $ 0 $ 0