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REVENUE - Operating Revenues by Geographic Region (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
REVENUE    
Total Operating Revenue $ 226,525 $ 127,611
Domestic    
REVENUE    
Total Operating Revenue 208,591 119,312
Latin America    
REVENUE    
Total Operating Revenue 17,869 7,877
Other    
REVENUE    
Total Operating Revenue $ 65 $ 422