Income Taxes - Summary of Unrecognized Tax Benefits and Temporary Differences (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Unrecognized tax benefits
Balance at the beginning of the period	$ 19	$ 13
Increases related to current year tax positions	435	11
Decreases due to tax positions expired	(5)	(5)
Balance at the end of the period	449	19
Deferred tax assets:
Unearned lease revenue	9,614	3,867
State taxes	167	2
Inventory	2,426	2,123
Reserves and allowances	5,471	4,425
Other accruals	29,231	15,973
Lease liability	934	1,366
Net operating loss carry forward	51,240	67,595
California alternative minimum tax credit	0	33
Charitable contributions	2	2
Total deferred tax assets	99,085	95,386
Less: valuation allowance	(978)	(536)
Net deferred tax assets	98,107	94,850
Deferred tax liabilities:
Depreciation and impairment on aircraft engines and equipment	(231,694)	(208,389)
Notes receivable	(5,405)	(5,479)
Lease liability	(930)	(1,360)
Other deferred tax liabilities	(4,622)	(4,590)
Net deferred tax liabilities	(242,651)	(219,818)
Other comprehensive income deferred tax liability	(3,235)	(7,548)
Net deferred tax liabilities	(147,779)	$ (132,516)
Federal
Deferred tax liabilities:
Operating loss carryforwards	235,400
State
Deferred tax liabilities:
Operating loss carryforwards	1,000
State | California Franchise Tax Board
Deferred tax liabilities:
Valuation allowance of net operating loss	500
State | Georgia Department of Revenue
Deferred tax liabilities:
Valuation allowance of net operating loss	$ 100