Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Income tax credits	$ 4,298	$ 4,298
Net operating losses	263,350	220,071
Deferred revenue	23,119	11,740
Nondeductible accruals	21,858	21,918
Deferred manufacturing credits	8,458	6,442
Accrued maintenance	566	568
Equity compensation	3,787	3,433
Loan liability	11,643	0
Operating lease liability	432,492	313,142
Interest expense	18,544	0
Other	334	465
Valuation allowance	(5,099)	(2,949)
Deferred tax assets	783,350	579,128
Deferred tax liabilities:
Convertible debt	0	14,942
Prepaid expenses	770	898
Property, plant and equipment	644,407	603,173
Deferred financing costs	99	124
Accrued aircraft and engine maintenance	74,742	80,916
Right-of-use asset	438,804	318,969
Deferred tax liabilities	1,158,822	1,019,022
Net deferred tax assets (liabilities)	$ (375,472)	$ (439,894)