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OTHER FINANCIAL LIABILITIES (Details) - Schedule of movement of lease liabilities - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aircraft [member]      
OTHER FINANCIAL LIABILITIES (Details) - Schedule of movement of lease liabilities [Line Items]      
Opening balance $ 3,042,231 $ 2,737,809 $ 3,037,585
Changes (15,658) 304,422 (299,776)
Closing balance 3,026,573 3,042,231 2,737,809
New contracts   719,525 283,620
Write off (7,435)    
Renegotiations (35,049) (41,535) (240,047)
Payments (131,427) (539,549) (526,071)
Accrued interest 158,253 165,981 174,327
Exchange differences  
Cumulative translation adjustment    
Other increases (decreases)   8,395
Others [Member]      
OTHER FINANCIAL LIABILITIES (Details) - Schedule of movement of lease liabilities [Line Items]      
Opening balance 129,926 120,240 109,387
Changes (35,493) 9,686 10,853
Closing balance 94,433 129,926 120,240
New contracts 543 23,878 36,191
Write off (285)    
Renegotiations 4,919 12,208 1,397
Payments (36,689) (37,391) (30,316)
Accrued interest 9,348 11,968 8,623
Exchange differences (7,967) 1,614 (5,667)
Cumulative translation adjustment (38) (467)  
Other increases (decreases) (5,324) (2,124) 625
Lease Liability total [Member]      
OTHER FINANCIAL LIABILITIES (Details) - Schedule of movement of lease liabilities [Line Items]      
Opening balance 3,172,157 2,858,049 3,146,972
Changes (51,151) 314,108 (288,923)
Closing balance 3,121,006 3,172,157 2,858,049
New contracts 543 743,403 319,811
Write off (7,720)    
Renegotiations (30,130) (29,327) (238,650)
Payments (168,116) (576,940) (556,387)
Accrued interest 167,601 177,949 182,950
Exchange differences (7,967) 1,614 (5,667)
Cumulative translation adjustment (38) (467)  
Other increases (decreases) $ (5,324) $ (2,124) $ 9,020