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Property and Equipment (Details) $ in Thousands	Sep. 30, 2025 USD ($) Aircraft	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 4,115,212	$ 4,137,143
Less accumulated depreciation and amortization	1,142,071	1,067,194
Property and equipment, net	$ 2,973,141	3,069,949
Number Of Aircraft Committed To Purchase | Aircraft	34
Airline
Property, Plant and Equipment [Line Items]
Flight equipment	$ 3,574,082	3,345,458
Computer hardware and software	340,111	320,432
Land and buildings/leasehold improvements	82,520	66,115
Other property and equipment	118,499	115,043
Sunseeker Resorts
Property, Plant and Equipment [Line Items]
Land and buildings/leasehold improvements	0	255,201
Other property and equipment	$ 0	$ 34,894

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