SEGMENT INFORMATION - Summary of Geographic Sources of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 94,309	$ 149,848	$ 207,149	$ 264,742
Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	79,834	79,200	166,283	151,652
Infrastructure
Segment Reporting Information [Line Items]
Total revenues	14,475	70,648	40,866	113,090
Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	5,969	5,039	10,762	7,854
Corporate and Other | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	4,575	4,219	8,032	6,260
Corporate and Other | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	1,394	820	2,730	1,594
Africa
Segment Reporting Information [Line Items]
Total revenues	1,319	2,208	8,473	5,685
Africa | Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Asia
Segment Reporting Information [Line Items]
Total revenues	36,307	29,629	66,309	53,784
Asia | Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	4,575	4,219	8,032	6,260
Europe
Segment Reporting Information [Line Items]
Total revenues	31,287	35,413	70,859	67,298
Europe | Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
North America
Segment Reporting Information [Line Items]
Total revenues	24,406	80,252	58,935	133,520
North America | Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	1,394	820	2,730	1,594
South America
Segment Reporting Information [Line Items]
Total revenues	990	2,346	2,573	4,455
South America | Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Aviation Leasing | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	75,259	74,981	158,251	145,392
Aviation Leasing | Africa | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	1,319	2,208	8,473	5,685
Aviation Leasing | Asia | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	31,732	25,410	58,277	47,524
Aviation Leasing | Europe | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	31,287	35,413	70,859	67,298
Aviation Leasing | North America | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	9,931	9,604	18,069	20,430
Aviation Leasing | South America | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Total revenues	990	2,346	2,573	4,455
Jefferson Terminal | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	13,081	67,562	37,822	103,516
Jefferson Terminal | Africa | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Jefferson Terminal | Asia | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Jefferson Terminal | Europe | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Jefferson Terminal | North America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	13,081	67,562	37,822	103,516
Jefferson Terminal | South America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Ports and Terminals | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	2,266	314	7,980
Ports and Terminals | Africa | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Ports and Terminals | Asia | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Ports and Terminals | Europe | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Ports and Terminals | North America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	0	2,266	314	7,980
Ports and Terminals | South America | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Total revenues	$ 0	$ 0	$ 0	$ 0