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REVENUE RECOGNITION - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Disaggregation of Revenue [Line Items] |  |
Deferred revenue - total | $ 977,427 | $ 1,076,875
Less: Deferred revenue - current | (975,735) | (1,075,133)
Deferred revenue - non-current | 1,692 | 1,742
Flights - Prepaid Blocks |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue - total | 927,607 | 1,023,985
Memberships - annual dues |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue - total | 41,624 | 43,970
Memberships - initiation fees |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue - total | 3,677 | 3,899
Flights - credits |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue - total | 2,423 | 4,246
Other |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue - total | $ 2,096 | $ 775

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