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REVENUE RECOGNITION - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 351,812	$ 325,635
Services transferred at a point in time: | Flights, net of discounts and incentives
Disaggregation of Revenue [Line Items]
Revenue	231,762	236,363
Services transferred at a point in time: | Aircraft management
Disaggregation of Revenue [Line Items]
Revenue	61,242	58,049
Services transferred at a point in time: | Other
Disaggregation of Revenue [Line Items]
Revenue	31,807	7,178
Services transferred over time: | Aircraft management
Disaggregation of Revenue [Line Items]
Revenue	2,452	2,457
Services transferred over time: | Memberships
Disaggregation of Revenue [Line Items]
Revenue	21,680	20,647
Services transferred over time: | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 2,869	$ 941

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