Goodwill, Intangibles and Equity Investments - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite and Indefinite-lived Intangible Assets [Roll Forward]
Carrying value at beginning of period, airline certificates	$ 109,151	$ 120,316
Carrying value at beginning of period, amortizing intangibles	100,151	111,316
Amortization	(12,483)	(11,165)	$ (11,400)
Carrying value at end of period, airline certificates	96,668	109,151	120,316
Carrying value at end of period, amortizing intangibles	87,668	100,151	111,316
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