AIRCRAFT - Additional Information (Details) - aircraft	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
AIRCRAFT - Owned and Leased
Number of aircraft	53	60	53	54	48
Number of aircraft purchased		5
Reclassifications		0	0
Number of aircraft owned and refinanced		35
Number of aircrafts retired			1
Number of aircrafts financed using proceeds from issuance of pass-through trust certificates	5
Aircraft Held for Operating Lease
AIRCRAFT - Owned and Leased
Number of aircraft purchased		5
Boeing 737-800
AIRCRAFT - Owned and Leased
Number of aircraft		54
Number of aircraft purchased	6		6
B-737-900
AIRCRAFT - Owned and Leased
Number of aircraft		5
Boeing 737-700
AIRCRAFT - Owned and Leased
Number of aircraft		1
Passenger
AIRCRAFT - Owned and Leased
Number of aircraft	41	43	41	42	36
Reclassifications		0	0
Number of aircrafts financed		31
Number of aircrafts unencumbered		4