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Special Charges - Summary of Special Charges (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Interruption Loss [Line Items]
Accelerated depreciation on airframes identified for early retirement	$ 2,907		$ 4,231	$ 6,799	$ 28,398
Flight attendant ratification bonus	0		0	0	10,821
Sunseeker weather events, net of (insurance recoveries)	(2,324)		1,139	(4,155)	(2,637)
Total special charges	3,473		8,790	119,842	40,002
Airline
Business Interruption Loss [Line Items]
Restructuring charges	2,907		7,651	18,894	42,639
Sunseeker Resorts
Business Interruption Loss [Line Items]
Restructuring charges	566		1,139	100,948	(2,637)
Organizational Restructuring
Business Interruption Loss [Line Items]
Restructuring charges	0		3,420	12,095	3,420
Facility Sale | Sunseeker Resorts
Business Interruption Loss [Line Items]
Restructuring charges	$ 2,890	$ 102,200	$ 0	$ 105,103	$ 0

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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