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PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of right of use assets - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aircraft [Member]      
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of right of use assets [Line Items]      
Opening balances $ 2,768,540 $ 2,456,333 $ 2,786,685
Total changes (430,498) 312,207 (330,352)
Final balances 2,338,042 2,768,540 2,456,333
Additions 732,489 289,209
Fleet rejection (9,090)    
Write off    
Depreciation expense (395,936) (377,911) (371,789)
Cummulative translate adjustment (6,578) (2,046) (9,490)
Other increases (decreases) (18,894) (40,325) (238,282)
Others [Member]      
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of right of use assets [Line Items]      
Opening balances 101,158 92,111 78,632
Total changes (32,881) 9,047 13,479
Final balances 68,277 101,158 92,111
Additions 399 20,675 37,089
Fleet rejection    
Write off    
Depreciation expense (22,492) (22,473) (19,349)
Cummulative translate adjustment (11,173) (2,515) (4,261)
Other increases (decreases) 385 13,360  
Right-of-use assets [Member]      
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of right of use assets [Line Items]      
Opening balances 2,869,698 2,548,444 2,865,317
Total changes (463,379) 321,254 (316,873)
Final balances 2,406,319 2,869,698 2,548,444
Additions 399 753,164 326,298
Fleet rejection (9,090)    
Write off    
Depreciation expense (418,428) (400,384) (391,138)
Cummulative translate adjustment (17,751) (4,561) (13,751)
Other increases (decreases) $ (18,509) $ (26,965) $ (238,282)