Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 494,144	$ 488,989	$ 1,728,802	$ 1,663,423
Passenger Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	494,144	488,989
Resort Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,358	13,069	60,680	53,768
Scheduled service
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			707,771	769,041
Scheduled service \| Passenger Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	177,194	206,447
Ancillary air-related charges
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			963,700	853,333
Ancillary air-related charges \| Passenger Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	295,548	271,150
Loyalty redemptions
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			57,331	41,049
Loyalty redemptions \| Passenger Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	21,402	11,392
Rooms \| Resort Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,009	5,190	28,172	21,800
Food and beverage \| Resort Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,553	5,929	21,280	24,344
Other \| Resort Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,796	$ 1,950	$ 11,228	$ 7,624