SEGMENT INFORMATION - Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total assets	$ 2,947,700	$ 2,638,778
Debt, net	1,540,017	1,237,347
Total liabilities	1,974,646	1,584,996
Equity
Non-controlling interest in equity of consolidated subsidiaries	53,195	56,383
Total equity	973,054	1,053,782
Total liabilities and equity	2,947,700	2,638,778
Operating Segments | Equipment Leasing | Aviation Leasing
Segment Reporting Information [Line Items]
Total assets	1,428,504	1,367,074
Debt, net	0	0
Total liabilities	239,836	234,449
Equity
Non-controlling interest in equity of consolidated subsidiaries	0	0
Total equity	1,188,668	1,132,625
Total liabilities and equity	1,428,504	1,367,074
Operating Segments | Infrastructure | Jefferson Terminal
Segment Reporting Information [Line Items]
Total assets	717,611	670,682
Debt, net	248,472	234,862
Total liabilities	321,624	288,256
Equity
Non-controlling interest in equity of consolidated subsidiaries	48,851	52,058
Total equity	395,987	382,426
Total liabilities and equity	717,611	670,682
Operating Segments | Infrastructure | Railroad
Segment Reporting Information [Line Items]
Total assets	72,731	64,286
Debt, net	22,540	22,239
Total liabilities	45,640	37,207
Equity
Non-controlling interest in equity of consolidated subsidiaries	3,248	3,258
Total equity	27,091	27,079
Total liabilities and equity	72,731	64,286
Operating Segments | Infrastructure | Ports and Terminals
Segment Reporting Information [Line Items]
Total assets	445,035	277,160
Debt, net	80,800	0
Total liabilities	156,468	16,615
Equity
Non-controlling interest in equity of consolidated subsidiaries	572	544
Total equity	288,567	260,545
Total liabilities and equity	445,035	277,160
Corporate
Segment Reporting Information [Line Items]
Total assets	283,819	259,576
Debt, net	1,188,205	980,246
Total liabilities	1,211,078	1,008,469
Equity
Non-controlling interest in equity of consolidated subsidiaries	524	523
Total equity	(927,259)	(748,893)
Total liabilities and equity	$ 283,819	$ 259,576