PROPERTY AND EQUIPMENT - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 666,886	$ 656,590
Less: Accumulated depreciation and amortization	(268,176)	(262,031)
Total	398,710	394,559
Aircraft
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	563,934	566,338
Software development costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	73,098	65,303
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,769	11,930
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,719	3,014
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,424	1,424
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,110	3,208
Tooling
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,998	3,835
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,834	$ 1,538

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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