SEGMENT INFORMATION - Reconciliation of Adjusted Net Income to Net Income (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]                      
Adjusted Net Income (Loss)                 $ 7,787 $ 20,657 $ 25,081
Add: Non-controlling share of adjustments to Adjusted Net Income                 1,333 525 0
Equity in (loss) earnings of unconsolidated entities                 (6,956) 6,093 10,325
Add: Cash payments for income taxes                 507 274 0
Less: Incentive allocations                 0 0 0
Less: Pro-rata share of Adjusted Net Income from investments in unconsolidated entities                 (3,552) (6,155) (10,325)
Less: Asset impairment charges                 0 0 0
Less: Changes in fair value of non-hedge derivative instruments                 (14) (25) 0
Less: Losses on the modification or extinguishment of debt and capital lease obligations                 0 0 0
Less: Acquisition and transaction expenses                 (5,683) (11,450) (260)
Less: Equity-based compensation expense                 (4,662) (1,265) 0
Less: Provision for income taxes $ 60 $ (150) $ (266) $ (230) $ (160) $ (156) $ (399) $ (159) (586) (874) 0
Net (loss) income attributable to shareholders $ (4,699) $ (11,738) $ (837) $ 5,448 $ 3,675 $ 4,031 $ (1,352) $ 1,426 (11,826) 7,780 24,821
Operating Segments | Reportable Subsegments | Equipment Leasing | Aviation Leasing                      
Segment Reporting Information [Line Items]                      
Adjusted Net Income (Loss)                 37,777 17,136 3,920
Equity in (loss) earnings of unconsolidated entities                 0 0 0
Less: Acquisition and transaction expenses                 0 0 0
Less: Provision for income taxes                 (668) (490) 0
Net (loss) income attributable to shareholders                 37,336 16,912 3,920
Operating Segments | Reportable Subsegments | Equipment Leasing | Offshore Energy                      
Segment Reporting Information [Line Items]                      
Adjusted Net Income (Loss)                 9,627 8,976 12,159
Equity in (loss) earnings of unconsolidated entities                 0 0 2,700
Less: Acquisition and transaction expenses                 0 0 0
Less: Provision for income taxes                 0 0 0
Net (loss) income attributable to shareholders                 9,627 8,983 12,159
Operating Segments | Reportable Subsegments | Equipment Leasing | Shipping Containers                      
Segment Reporting Information [Line Items]                      
Adjusted Net Income (Loss)                 7,991 11,453 12,031
Equity in (loss) earnings of unconsolidated entities                 (6,956) 6,093 7,625
Less: Acquisition and transaction expenses                 0 0 0
Less: Provision for income taxes                 127 (100) 0
Net (loss) income attributable to shareholders                 (2,404) 11,266 12,031
Operating Segments | Reportable Subsegments | Infrastructure | Jefferson Terminal                      
Segment Reporting Information [Line Items]                      
Adjusted Net Income (Loss)                 (22,153) (3,209)  
Equity in (loss) earnings of unconsolidated entities                 0 0 0
Less: Acquisition and transaction expenses                 0 (5,494) 0
Less: Provision for income taxes                 (41) (284) 0
Net (loss) income attributable to shareholders                 (24,061) (9,599) 0
Operating Segments | Reportable Subsegments | Infrastructure | Railroad                      
Segment Reporting Information [Line Items]                      
Adjusted Net Income (Loss)                 (2,898) (6,183)  
Equity in (loss) earnings of unconsolidated entities                 0 0 0
Less: Acquisition and transaction expenses                 0 (5,646) 0
Less: Provision for income taxes                 0 0 0
Net (loss) income attributable to shareholders                 (4,056) (11,957) 0
Corporate                      
Segment Reporting Information [Line Items]                      
Adjusted Net Income (Loss)                 (22,557) (7,516) (3,029)
Equity in (loss) earnings of unconsolidated entities                 0 0 0
Less: Acquisition and transaction expenses                 (5,683) (310) (260)
Less: Provision for income taxes                 (4) 0 0
Net (loss) income attributable to shareholders                 $ (28,268) $ (7,825) $ (3,289)