LEASE RENTAL REVENUES AND AIRCRAFT AND ENGINES HELD FOR LEASE - Minimum future annual lease rentals contracted to be received under existing operating leases of flight equipment (Details) $ in Thousands	Sep. 30, 2021 USD ($)
LEASE RENTAL REVENUES AND AIRCRAFT AND ENGINES HELD FOR LEASE
Remainder of 2021	$ 6,900
2022	15,616
2023	2,875
Total minimum lease payments	$ 25,391