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REVENUE - Operating Revenues by Geographic Region (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
REVENUE    
Total Operating Revenues $ 294,115 $ 226,525
Domestic    
REVENUE    
Total Operating Revenues 273,423 208,591
Latin America    
REVENUE    
Total Operating Revenues 20,255 17,869
Other    
REVENUE    
Total Operating Revenues $ 437 $ 65