SEGMENT INFORMATION - Summary of Geographic Sources of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 124,627	$ 68,844
Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	72,452	55,784
Infrastructure
Segment Reporting Information [Line Items]
Total revenues	52,175	13,060
Corporate
Segment Reporting Information [Line Items]
Total revenues	2,041	3,049
Africa
Segment Reporting Information [Line Items]
Total revenues	3,477	1,385
Africa | Corporate
Segment Reporting Information [Line Items]
Total revenues	0	0
Asia
Segment Reporting Information [Line Items]
Total revenues	24,155	11,892
Asia | Corporate
Segment Reporting Information [Line Items]
Total revenues	2,041	2,683
Europe
Segment Reporting Information [Line Items]
Total revenues	31,885	34,918
Europe | Corporate
Segment Reporting Information [Line Items]
Total revenues	0	0
North America
Segment Reporting Information [Line Items]
Total revenues	63,001	20,559
North America | Corporate
Segment Reporting Information [Line Items]
Total revenues	0	366
South America
Segment Reporting Information [Line Items]
Total revenues	2,109	90
South America | Corporate
Segment Reporting Information [Line Items]
Total revenues	0	0
Aviation Leasing | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	70,411	52,735
Aviation Leasing | Africa | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	3,477	1,385
Aviation Leasing | Asia | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	22,114	9,209
Aviation Leasing | Europe | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	31,885	34,918
Aviation Leasing | North America | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	10,826	7,133
Aviation Leasing | South America | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	2,109	90
Jefferson Terminal | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	35,954	1,253
Jefferson Terminal | Africa | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Jefferson Terminal | Asia | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Jefferson Terminal | Europe | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Jefferson Terminal | North America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	35,954	1,253
Jefferson Terminal | South America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Railroad | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	10,507	11,047
Railroad | Africa | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Railroad | Asia | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Railroad | Europe | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Railroad | North America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	10,507	11,047
Railroad | South America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Ports and Terminals | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	5,714	760
Ports and Terminals | Africa | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Ports and Terminals | Asia | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Ports and Terminals | Europe | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0
Ports and Terminals | North America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	5,714	760
Ports and Terminals | South America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	$ 0	$ 0