Summary of Significant Accounting Policies - Schedule of Property and Equipment Useful Lives (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Aircraft
Property, Plant and Equipment [Line Items]
Depreciable Life (in years)	7 years
Current Residual Value	$ 50
Spare engines
Property, Plant and Equipment [Line Items]
Depreciable Life (in years)	7 years
Current Residual Value	$ 25
Rotable parts
Property, Plant and Equipment [Line Items]
Depreciable Life (in years)	7 years
Current Residual Value	10.00%
Ground equipment
Property, Plant and Equipment [Line Items]
Depreciable Life (in years)	10 years
Current Residual Value	0.00%
Office equipment
Property, Plant and Equipment [Line Items]
Depreciable Life (in years)	10 years
Current Residual Value	0.00%
Leasehold improvements
Property, Plant and Equipment [Line Items]
Current Residual Value	0.00%