REVENUES - Components of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 135,962	$ 83,709	$ 310,026	$ 290,858
Corporate and Other
Disaggregation of Revenue [Line Items]
Total revenues	6,040	4,279	12,874	15,041
Total equipment leasing revenues
Disaggregation of Revenue [Line Items]
Total revenues	99,174	69,799	237,352	236,082
Total equipment leasing revenues | Corporate and Other
Disaggregation of Revenue [Line Items]
Total revenues	5,236	3,308	8,870	11,340
Total infrastructure revenues
Disaggregation of Revenue [Line Items]
Total revenues	36,788	13,910	72,674	54,776
Total infrastructure revenues | Corporate and Other
Disaggregation of Revenue [Line Items]
Total revenues	804	971	4,004	3,701
Equipment Leasing | Lease income
Disaggregation of Revenue [Line Items]
Total revenues	42,778	40,440	125,907	134,887
Equipment Leasing | Maintenance revenue
Disaggregation of Revenue [Line Items]
Total revenues	40,252	25,609	87,763	84,709
Equipment Leasing | Finance lease income
Disaggregation of Revenue [Line Items]
Total revenues	439	591	1,285	1,433
Equipment Leasing | Other revenue
Disaggregation of Revenue [Line Items]
Total revenues	15,705	3,159	22,397	15,053
Equipment Leasing | Total equipment leasing revenues
Disaggregation of Revenue [Line Items]
Total revenues	99,174	69,799	237,352	236,082
Infrastructure | Lease income
Disaggregation of Revenue [Line Items]
Total revenues	791	368	1,653	775
Infrastructure | Other revenue
Disaggregation of Revenue [Line Items]
Total revenues	346	2,213	13,829	5,257
Infrastructure | Rail revenues
Disaggregation of Revenue [Line Items]
Total revenues	24,182
Infrastructure | Terminal services revenues
Disaggregation of Revenue [Line Items]
Total revenues	11,469	11,329	33,010	40,534
Infrastructure | Crude marketing revenues
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	8,210
Infrastructure | Total infrastructure revenues
Disaggregation of Revenue [Line Items]
Total revenues	36,788	13,910	72,674	54,776
Aviation Leasing | Equipment Leasing
Disaggregation of Revenue [Line Items]
Total revenues	93,938	66,491	228,482	224,742
Aviation Leasing | Equipment Leasing | Lease income
Disaggregation of Revenue [Line Items]
Total revenues	40,392	38,537	120,389	127,983
Aviation Leasing | Equipment Leasing | Maintenance revenue
Disaggregation of Revenue [Line Items]
Total revenues	40,252	25,609	87,763	84,709
Aviation Leasing | Equipment Leasing | Finance lease income
Disaggregation of Revenue [Line Items]
Total revenues	439	591	1,285	1,433
Aviation Leasing | Equipment Leasing | Other revenue
Disaggregation of Revenue [Line Items]
Total revenues	12,855	1,754	19,045	10,617
Aviation Leasing | Equipment Leasing | Total equipment leasing revenues
Disaggregation of Revenue [Line Items]
Total revenues	93,938	66,491	228,482	224,742
Jefferson Terminal | Infrastructure
Disaggregation of Revenue [Line Items]
Total revenues	11,902	11,697	34,148	49,519
Jefferson Terminal | Infrastructure | Lease income
Disaggregation of Revenue [Line Items]
Total revenues	433	368	1,295	775
Jefferson Terminal | Infrastructure | Terminal services revenues
Disaggregation of Revenue [Line Items]
Total revenues	11,469	11,329	32,853	40,534
Jefferson Terminal | Infrastructure | Crude marketing revenues
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	8,210
Jefferson Terminal | Infrastructure | Total infrastructure revenues
Disaggregation of Revenue [Line Items]
Total revenues	11,902	11,697	34,148	49,519
Ports and Terminals | Infrastructure
Disaggregation of Revenue [Line Items]
Total revenues	(458)	1,242	9,982	1,556
Ports and Terminals | Infrastructure | Lease income
Disaggregation of Revenue [Line Items]
Total revenues		0	0	0
Ports and Terminals | Infrastructure | Other revenue
Disaggregation of Revenue [Line Items]
Total revenues	(458)	1,242	9,825	1,556
Ports and Terminals | Infrastructure | Terminal services revenues
Disaggregation of Revenue [Line Items]
Total revenues		0	157	0
Ports and Terminals | Infrastructure | Total infrastructure revenues
Disaggregation of Revenue [Line Items]
Total revenues	(458)	1,242	9,982	1,556
Corporate and Other
Disaggregation of Revenue [Line Items]
Total revenues	6,040	4,279	12,874	15,041
Corporate and Other | Lease income
Disaggregation of Revenue [Line Items]
Total revenues	2,386	1,903	5,518	6,904
Corporate and Other | Other revenue
Disaggregation of Revenue [Line Items]
Total revenues	2,850	1,405	3,352	4,436
Corporate and Other | Total equipment leasing revenues
Disaggregation of Revenue [Line Items]
Total revenues	5,236	$ 3,308	8,870	$ 11,340
Transtar | Infrastructure
Disaggregation of Revenue [Line Items]
Total revenues	24,540		24,540
Transtar | Infrastructure | Lease income
Disaggregation of Revenue [Line Items]
Total revenues	358		358
Transtar | Infrastructure | Rail revenues
Disaggregation of Revenue [Line Items]
Total revenues	24,182		24,182
Transtar | Infrastructure | Total infrastructure revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 24,540		$ 24,540