Reportable Segments (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment.	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Reportable Segments
Number of reportable segments | segment.				2
Number of operating segments | segment.				2
Revenue:
Lease rent revenue		$ 68,440	$ 71,500	$ 135,363	$ 145,219
Maintenance reserve revenue		29,986	26,475	50,514	51,825
(Loss) Gain on sale of leased equipment		(700)	5,120	1,367	14,690
Total revenue		74,983	95,797	156,592	199,566
Expenses:
Depreciation and amortization expense		23,764	20,043	47,154	40,301
Cost of spare parts and equipment sales		2,648	12,585	9,336	26,997
Write-down of equipment		6,997	3,262	9,126	4,367
General and administrative		15,228	21,389	34,795	42,829
Technical expense		1,468	1,407	2,595	3,195
Interest expense		16,089	16,781	31,785	34,660
Loss on debt extinguishment		0	220	4,688	220
Total net finance costs		16,089	17,001	36,473	34,880
Total expenses		66,194	75,687	139,479	152,569
Earnings from operations		8,789	20,110	17,113	46,997
Total assets	[1]	2,209,571		2,209,571		$ 1,940,608
Operating Segments | Leasing and Related Operations
Revenue:
Lease rent revenue		68,440	71,500	135,363	145,219
(Loss) Gain on sale of leased equipment		(700)	5,120	1,367	14,690
Total revenue		72,229	81,469	145,953	170,221
Expenses:
Depreciation and amortization expense		23,739	20,023	47,114	40,259
Cost of spare parts and equipment sales		4	252	152	2,088
Write-down of equipment		6,997	3,262	9,126	4,367
General and administrative		14,808	19,919	33,350	39,893
Technical expense		1,468	1,407	2,595	3,194
Interest expense		16,089	16,781	31,785	34,660
Loss on debt extinguishment		0	220	4,688	220
Total net finance costs		16,089	17,001	36,473	34,880
Total expenses		63,105	61,864	128,810	124,681
Earnings from operations		9,124	19,605	17,143	45,540
Total assets		2,163,689		2,163,689		1,898,313
Operating Segments | Spare Parts Sales
Revenue:
Lease rent revenue		0	0	0	0
(Loss) Gain on sale of leased equipment		0	0	0	0
Total revenue		2,781	14,351	10,900	29,462
Expenses:
Depreciation and amortization expense		25	20	40	42
Cost of spare parts and equipment sales		2,644	12,333	9,184	24,909
Write-down of equipment		0	0	0	0
General and administrative		420	1,470	1,445	2,936
Technical expense		0	0	0	1
Interest expense		0	0	0	0
Loss on debt extinguishment		0	0	0	0
Total net finance costs		0	0	0	0
Total expenses		3,089	13,823	10,669	27,888
Earnings from operations		(308)	528	231	1,574
Total assets		45,882		45,882		42,295
Eliminations
Revenue:
Lease rent revenue		0	0	0	0
(Loss) Gain on sale of leased equipment		0	0	0	0
Total revenue		(27)	(23)	(261)	(117)
Expenses:
Depreciation and amortization expense		0	0	0	0
Cost of spare parts and equipment sales		0	0	0	0
Write-down of equipment		0	0	0	0
General and administrative		0	0	0	0
Technical expense		0	0	0	0
Interest expense		0	0	0	0
Loss on debt extinguishment		0	0	0	0
Total net finance costs		0	0	0	0
Total expenses		0	0	0	0
Earnings from operations		(27)	(23)	(261)	(117)
Total assets		0		0		$ 0
Lease rent revenue
Revenue:
Lease rent revenue		38,454	45,025	84,849	93,394
Lease rent revenue | Operating Segments | Leasing and Related Operations
Revenue:
Lease rent revenue		38,454	45,025	84,849	93,394
Lease rent revenue | Operating Segments | Spare Parts Sales
Revenue:
Lease rent revenue		0	0	0	0
Lease rent revenue | Eliminations
Revenue:
Lease rent revenue		0	0	0	0
Maintenance reserve revenue
Revenue:
Lease rent revenue		29,986	26,475	50,514	51,825
Maintenance reserve revenue | Operating Segments | Leasing and Related Operations
Revenue:
Lease rent revenue		29,986	26,475	50,514	51,825
Maintenance reserve revenue | Operating Segments | Spare Parts Sales
Revenue:
Lease rent revenue		0	0	0	0
Maintenance reserve revenue | Eliminations
Revenue:
Lease rent revenue		0	0	0	0
Spare parts and equipment sales
Revenue:
Maintenance reserve revenue		2,855	14,586	11,960	32,088
Spare parts and equipment sales | Operating Segments | Leasing and Related Operations
Revenue:
Maintenance reserve revenue		102	266	1,327	2,751
Spare parts and equipment sales | Operating Segments | Spare Parts Sales
Revenue:
Maintenance reserve revenue		2,753	14,320	10,633	29,337
Spare parts and equipment sales | Eliminations
Revenue:
Maintenance reserve revenue		0	0	0	0
Other revenue
Revenue:
Maintenance reserve revenue		4,388	4,591	7,902	7,569
Other revenue | Operating Segments | Leasing and Related Operations
Revenue:
Maintenance reserve revenue		4,387	4,583	7,896	7,561
Other revenue | Operating Segments | Spare Parts Sales
Revenue:
Maintenance reserve revenue		28	31	267	125
Other revenue | Eliminations
Revenue:
Maintenance reserve revenue		$ (27)	$ (23)	$ (261)	$ (117)

[1] Total assets at June 30, 2020 and December 31, 2019, respectively, include the following assets of variable interest entities (“VIEs”) that can only be used to settle the liabilities of the VIEs: Cash nil and $134; Restricted cash $71,251 and $56,523; Equipment $1,098,181 and $1,004,851; Maintenance Rights $767 and $3,133; Inventory $2,382 and $2,832; and Other assets $778  and $668, respectively.