Significant Customers - Narrative (Details) - aircraft	3 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Number of aircraft		27	25
DHL
Concentration Risk [Line Items]
Lessor, number of leased aircraft		13
Amazon
Concentration Risk [Line Items]
Lessor, number of leased aircraft		37
B-767-200 | DHL
Concentration Risk [Line Items]
Lessor, number of leased aircraft		1
B-767-300 | DHL
Concentration Risk [Line Items]
Lessor, number of leased aircraft		12
B-767 | Maximum | DHL
Concentration Risk [Line Items]
Number of aircraft	4