Organization and Operations - Additional Information (Detail2) - AirCraft		3 Months Ended
Dec. 20, 2019	Dec. 31, 2023
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated		80
Boeing 737-400F [Member] \| DHL Flight Services Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircrafts operated	4
Number of aircraft leased	2
Aircraft lease term	5 years
Aircraft option to extend agreement description		DHL has the option to extend the agreement with respect to one or more aircraft for a period of one year with 90 days’ advance written notice.
Notice period for termination of agreement		At any time after the first anniversary of the commencement date of the first aircraft placed in service with 90 days' written notice.
Boeing 737-800F [Member] \| DHL Flight Services Agreement [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircraft leased	1

4

5 years

At any time after the first anniversary of the commencement date of the first aircraft placed in service with 90 days' written notice.