Reportable Segments (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Reportable Segments
Number of reportable segments | segment		2
Number of operating segments | segment		2
Revenue:
Interest revenue		$ 2,046	$ 2,114
(Loss) gain on sale of leased equipment		(133)	2,298
Total revenue		89,535	68,817
Expenses:
Depreciation and amortization expense		22,549	21,809
Cost of spare parts and equipment sales		4,499	4,862
Write-down of equipment		0	21,117
General and administrative		33,271	23,605
Technical expense		2,829	5,646
Interest expense		18,389	16,883
Total finance costs		18,389	16,883
Total expenses		81,537	93,922
(Loss) income from operations		7,998	(25,105)
Total assets	[1]	2,587,334		$ 2,575,217
Operating Segments | Leasing and  Related Operations
Revenue:
Interest revenue		2,046	2,114
(Loss) gain on sale of leased equipment		(133)	2,298
Total revenue		84,474	62,271
Expenses:
Depreciation and amortization expense		22,517	21,782
Cost of spare parts and equipment sales		8	6
Write-down of equipment			21,117
General and administrative		32,231	22,806
Technical expense		2,829	5,646
Interest expense		18,389	16,883
Total finance costs		18,389	16,883
Total expenses		75,974	88,240
(Loss) income from operations		8,500	(25,969)
Total assets		2,542,279		2,530,130
Operating Segments | Spare Parts Sales
Revenue:
Interest revenue		0	0
(Loss) gain on sale of leased equipment		0	0
Total revenue		5,095	6,604
Expenses:
Depreciation and amortization expense		32	27
Cost of spare parts and equipment sales		4,491	4,856
Write-down of equipment			0
General and administrative		1,040	799
Technical expense		0	0
Interest expense		0	0
Total finance costs		0	0
Total expenses		5,563	5,682
(Loss) income from operations		(468)	922
Total assets		45,055		45,087
Eliminations
Revenue:
Interest revenue		0	0
(Loss) gain on sale of leased equipment		0	0
Total revenue		(34)	(58)
Expenses:
Depreciation and amortization expense		0	0
Cost of spare parts and equipment sales		0	0
Write-down of equipment			0
General and administrative		0	0
Technical expense		0	0
Interest expense		0	0
Total finance costs		0	0
Total expenses		0	0
(Loss) income from operations		(34)	(58)
Total assets		0		$ 0
Lease rent revenue
Revenue:
Lease rent and maintenance reserve revenue		53,220	38,125
Lease rent revenue | Operating Segments | Leasing and  Related Operations
Revenue:
Lease rent and maintenance reserve revenue		53,220	38,125
Lease rent revenue | Operating Segments | Spare Parts Sales
Revenue:
Lease rent and maintenance reserve revenue		0	0
Lease rent revenue | Eliminations
Revenue:
Lease rent and maintenance reserve revenue		0	0
Maintenance reserve revenue
Revenue:
Lease rent and maintenance reserve revenue		23,498	14,834
Maintenance reserve revenue | Operating Segments | Leasing and  Related Operations
Revenue:
Lease rent and maintenance reserve revenue		23,498	14,834
Maintenance reserve revenue | Operating Segments | Spare Parts Sales
Revenue:
Lease rent and maintenance reserve revenue		0	0
Maintenance reserve revenue | Eliminations
Revenue:
Lease rent and maintenance reserve revenue		0	0
Spare parts and equipment sales
Revenue:
Other sales and revenue		5,052	6,630
Spare parts and equipment sales | Operating Segments | Leasing and  Related Operations
Revenue:
Other sales and revenue		55	202
Spare parts and equipment sales | Operating Segments | Spare Parts Sales
Revenue:
Other sales and revenue		4,997	6,428
Spare parts and equipment sales | Eliminations
Revenue:
Other sales and revenue		0	0
Other revenue
Revenue:
Other sales and revenue		5,852	4,816
Other revenue | Operating Segments | Leasing and  Related Operations
Revenue:
Other sales and revenue		5,788	4,698
Other revenue | Operating Segments | Spare Parts Sales
Revenue:
Other sales and revenue		98	176
Other revenue | Eliminations
Revenue:
Other sales and revenue		$ (34)	$ (58)

[1] Total assets at March 31, 2023 and December 31, 2022, include the following assets of variable interest entities (“VIEs”) that can only be used to settle the liabilities of the VIEs: Restricted cash $54,684 and $76,870; Equipment $1,183,337 and $1,167,970; Maintenance Rights $6,822 and $5,433; Notes receivable $79,502 and $80,220; and Other assets $6,543 and $6,470 (each respectively).