Goodwill, Intangibles and Equity Investments - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite and Indefinite-lived Intangible Assets [Roll Forward]
Carrying value at beginning of period, airline certificates	$ 96,668	$ 109,151
Carrying value at beginning of period, amortizing intangibles	87,668	100,151
Amortization	(10,215)	(12,483)	$ (11,200)
Carrying value at end of period, airline certificates	86,453	96,668	109,151
Carrying value at end of period, amortizing intangibles	77,453	87,668	100,151
Airline Certificates
Finite and Indefinite-lived Intangible Assets [Roll Forward]
Carrying value at beginning of period, airline certificates	9,000	9,000
Carrying value at end of period, airline certificates	$ 9,000	$ 9,000	$ 9,000