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REVENUE - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended
REVENUE - Additional Information (Details) $ in Thousands	Mar. 31, 2025	Mar. 31, 2025 USD ($) aircraft	Mar. 31, 2024 USD ($)
REVENUE
Total Operating Revenues \| $		$ 326,649	$ 311,483
Credit card program, term	7 years
Credit card program, renewal term	1 year
Cargo \| Aircrafts Operated For Amazon
REVENUE
Number of cargo aircraft		8
Number of additional aircrafts		3
Number of aircrafts in-service		1
Cargo \| Minimum \| Aircrafts Operated For Amazon
REVENUE
Number of cargo aircraft		12
Cargo \| Maximum \| Aircrafts Operated For Amazon
REVENUE
Number of cargo aircraft		20
Rental Revenue
REVENUE
Total Operating Revenues \| $		$ 8,636	9,275
Passenger
REVENUE
Total Operating Revenues \| $		285,888	$ 274,664
Revenue recognized \| $		$ 133,807