SEGMENT INFORMATION - Statement of Income by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 114,142	$ 58,771			$ 274,562	$ 159,108
Revenues
Total revenues	162,221	101,155			445,853	241,978
Expenses
Operating expenses	89,368	41,667			244,049	96,839
General and administrative	6,284	4,012			15,313	12,171
Acquisition and transaction expenses	5,618	1,460			9,400	4,734
Management fees and incentive allocation to affiliate	7,378	3,846			16,926	12,080
Depreciation and amortization	43,744	34,422			125,877	96,853
Interest expense	25,488	15,142			72,263	39,870
Total expenses	177,880	100,549			483,828	262,547
Other income (expense)
Equity in losses of unconsolidated entities	(974)	(442)			(1,527)	(598)
Gain on sale of equipment, net	37,061	262			61,416	5,253
Interest income	121	111			452	361
Other income	1,131	737			3,465	2,074
Total other income	37,339	668			63,806	7,090
Income (loss) before income taxes	21,680	1,274			25,831	(13,479)
Provision for (benefit from) income taxes	1,004	551			(842)	1,580
Net income (loss)	20,676	723	$ 5,997	$ (15,782)	26,673	(15,059)
Less: Net loss attributable to non-controlling interests in consolidated subsidiaries	(4,995)	(3,855)			(12,950)	(19,904)
Net income attributable to shareholders	25,671	4,578			39,623	4,845
Africa
Revenues
Total revenues	4,470	3,374			10,155	6,779
Asia
Revenues
Total revenues	29,731	25,717			83,515	54,539
Europe
Revenues
Total revenues	43,217	30,794			110,515	98,570
North America
Revenues
Total revenues	83,240	39,524			235,650	79,918
South America
Revenues
Total revenues	1,563	1,746			6,018	2,172
Equipment Leasing
Revenues
Total revenues	87,259	70,890			238,911	186,004
Infrastructure
Revenues
Total revenues	74,962	30,265			206,942	55,974
Other income (expense)
Income (loss) before income taxes
Operating Segments
Other income (expense)
Income (loss) before income taxes
Corporate and Other
Segment Reporting Information [Line Items]
Adjusted EBITDA	(11,478)	(10,371)			(25,872)	(25,809)
Revenues
Total revenues	954	1,099			7,214	7,360
Expenses
Operating expenses	3,400	3,751			7,702	10,067
General and administrative	6,284	4,012			15,313	12,171
Acquisition and transaction expenses	5,278	1,375			9,047	4,426
Management fees and incentive allocation to affiliate	7,378	3,846			16,926	12,080
Depreciation and amortization	1,846	1,627			5,066	4,855
Interest expense	20,791	10,652			57,826	26,536
Total expenses	44,977	25,263			111,880	70,135
Other income (expense)
Equity in losses of unconsolidated entities	73	113			91	394
Gain on sale of equipment, net	0	0			0	0
Interest income	4	4			12	12
Other income	1,003	0			1,003	0
Total other income	1,080	117			1,106	406
Income (loss) before income taxes	(42,943)	(24,047)			(103,560)	(62,369)
Provision for (benefit from) income taxes	0	0			4	2
Net income (loss)	(42,943)	(24,047)			(103,564)	(62,371)
Less: Net loss attributable to non-controlling interests in consolidated subsidiaries	0	0			0	0
Net income attributable to shareholders	(42,943)	(24,047)			(103,564)	(62,371)
Corporate and Other | Africa
Revenues
Total revenues	0	0			0	0
Corporate and Other | Asia
Revenues
Total revenues	954	734			7,214	6,264
Corporate and Other | Europe
Revenues
Total revenues	0	0			0	0
Corporate and Other | North America
Revenues
Total revenues	0	365			0	1,096
Corporate and Other | South America
Revenues
Total revenues	0	0			0	0
Aviation Leasing | Operating Segments | Equipment Leasing
Segment Reporting Information [Line Items]
Adjusted EBITDA	126,758	72,452			304,578	193,488
Revenues
Total revenues	86,305	69,791			231,697	178,644
Expenses
Operating expenses	2,473	2,115			11,272	7,412
General and administrative	0	0			0	0
Acquisition and transaction expenses	65	85			78	308
Management fees and incentive allocation to affiliate	0	0			0	0
Depreciation and amortization	33,911	26,343			97,183	73,031
Interest expense	0	0			0	0
Total expenses	36,449	28,543			108,533	80,751
Other income (expense)
Equity in losses of unconsolidated entities	(885)	(192)			(1,328)	(542)
Gain on sale of equipment, net	37,060	215			61,388	5,198
Interest income	31	13			85	119
Other income	0	0			0	0
Total other income	36,206	36			60,145	4,775
Income (loss) before income taxes	86,062	41,284			183,309	102,668
Provision for (benefit from) income taxes	816	540			(1,373)	1,546
Net income (loss)	85,246	40,744			184,682	101,122
Less: Net loss attributable to non-controlling interests in consolidated subsidiaries	0	0			0	(24)
Net income attributable to shareholders	85,246	40,744			184,682	101,146
Aviation Leasing | Operating Segments | Equipment Leasing | Africa
Revenues
Total revenues	4,470	3,374			10,155	6,779
Aviation Leasing | Operating Segments | Equipment Leasing | Asia
Revenues
Total revenues	28,777	24,983			76,301	48,275
Aviation Leasing | Operating Segments | Equipment Leasing | Europe
Revenues
Total revenues	43,217	30,794			110,515	98,570
Aviation Leasing | Operating Segments | Equipment Leasing | North America
Revenues
Total revenues	8,278	8,894			28,708	22,848
Aviation Leasing | Operating Segments | Equipment Leasing | South America
Revenues
Total revenues	1,563	1,746			6,018	2,172
Jefferson Terminal | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Adjusted EBITDA	(2,112)	(4,064)			(5,965)	(10,803)
Revenues
Total revenues	60,537	17,836			164,053	21,639
Expenses
Operating expenses	69,712	23,893			183,346	47,105
General and administrative	0	0			0	0
Acquisition and transaction expenses	0	0			0	0
Management fees and incentive allocation to affiliate	0	0			0	0
Depreciation and amortization	5,717	4,999			16,392	14,726
Interest expense	3,927	4,257			12,375	12,070
Total expenses	79,356	33,149			212,113	73,901
Other income (expense)
Equity in losses of unconsolidated entities	(162)	(363)			(290)	(450)
Gain on sale of equipment, net	0	0			12	0
Interest income	26	94			97	230
Other income	772	737			589	2,074
Total other income	636	468			408	1,854
Income (loss) before income taxes	(18,183)	(14,845)			(47,652)	(50,408)
Provision for (benefit from) income taxes	56	11			180	32
Net income (loss)	(18,239)	(14,856)			(47,832)	(50,440)
Less: Net loss attributable to non-controlling interests in consolidated subsidiaries	(5,031)	(3,759)			(12,885)	(20,017)
Net income attributable to shareholders	(13,208)	(11,097)			(34,947)	(30,423)
Jefferson Terminal | Operating Segments | Infrastructure | Africa
Revenues
Total revenues	0	0			0	0
Jefferson Terminal | Operating Segments | Infrastructure | Asia
Revenues
Total revenues	0	0			0	0
Jefferson Terminal | Operating Segments | Infrastructure | Europe
Revenues
Total revenues	0	0			0	0
Jefferson Terminal | Operating Segments | Infrastructure | North America
Revenues
Total revenues	60,537	17,836			164,053	21,639
Jefferson Terminal | Operating Segments | Infrastructure | South America
Revenues
Total revenues	0	0			0	0
Railroad | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Adjusted EBITDA	1,901	699			4,063	5,022
Revenues
Total revenues	10,251	8,907			30,735	28,742
Expenses
Operating expenses	8,379	8,274			26,666	23,525
General and administrative	0	0			0	0
Acquisition and transaction expenses	275	0			275	0
Management fees and incentive allocation to affiliate	0	0			0	0
Depreciation and amortization	583	613			1,996	1,760
Interest expense	301	233			949	719
Total expenses	9,538	9,120			29,886	26,004
Other income (expense)
Equity in losses of unconsolidated entities	0	0			0	0
Gain on sale of equipment, net	1	47			16	55
Interest income	13	0			17	0
Other income	0	0			0	0
Total other income	14	47			33	55
Income (loss) before income taxes	727	(166)			882	2,793
Provision for (benefit from) income taxes	132	0			347	0
Net income (loss)	595	(166)			535	2,793
Less: Net loss attributable to non-controlling interests in consolidated subsidiaries	116	(26)			101	231
Net income attributable to shareholders	479	(140)			434	2,562
Railroad | Operating Segments | Infrastructure | Africa
Revenues
Total revenues	0	0			0	0
Railroad | Operating Segments | Infrastructure | Asia
Revenues
Total revenues	0	0			0	0
Railroad | Operating Segments | Infrastructure | Europe
Revenues
Total revenues	0	0			0	0
Railroad | Operating Segments | Infrastructure | North America
Revenues
Total revenues	10,251	8,907			30,735	28,742
Railroad | Operating Segments | Infrastructure | South America
Revenues
Total revenues	0	0			0	0
Ports and Terminals | Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Adjusted EBITDA	(927)	55			(2,242)	(2,790)
Revenues
Total revenues	4,174	3,522			12,154	5,593
Expenses
Operating expenses	5,404	3,634			15,063	8,730
General and administrative	0	0			0	0
Acquisition and transaction expenses	0	0			0	0
Management fees and incentive allocation to affiliate	0	0			0	0
Depreciation and amortization	1,687	840			5,240	2,481
Interest expense	469	0			1,113	545
Total expenses	7,560	4,474			21,416	11,756
Other income (expense)
Equity in losses of unconsolidated entities	0	0			0	0
Gain on sale of equipment, net	0	0			0	0
Interest income	47	0			241	0
Other income	(644)	0			1,873	0
Total other income	(597)	0			2,114	0
Income (loss) before income taxes	(3,983)	(952)			(7,148)	(6,163)
Provision for (benefit from) income taxes	0	0			0	0
Net income (loss)	(3,983)	(952)			(7,148)	(6,163)
Less: Net loss attributable to non-controlling interests in consolidated subsidiaries	(80)	(70)			(166)	(94)
Net income attributable to shareholders	(3,903)	(882)			(6,982)	(6,069)
Ports and Terminals | Operating Segments | Infrastructure | Africa
Revenues
Total revenues	0	0			0	0
Ports and Terminals | Operating Segments | Infrastructure | Asia
Revenues
Total revenues	0	0			0	0
Ports and Terminals | Operating Segments | Infrastructure | Europe
Revenues
Total revenues	0	0			0	0
Ports and Terminals | Operating Segments | Infrastructure | North America
Revenues
Total revenues	4,174	3,522			12,154	5,593
Ports and Terminals | Operating Segments | Infrastructure | South America
Revenues
Total revenues	$ 0	$ 0			$ 0	$ 0