Quarterly report pursuant to Section 13 or 15(d)

REVENUES - Schedule of Revenues by Service Line (Details)

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REVENUES - Schedule of Revenues by Service Line (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Disaggregation of Revenue [Line Items]    
Revenue $ 301,737 $ 300,602
Service    
Disaggregation of Revenue [Line Items]    
Revenue 294,148 288,351
Oil and gas services    
Disaggregation of Revenue [Line Items]    
Revenue 195,080 189,596
Government services    
Disaggregation of Revenue [Line Items]    
Revenue 70,107 70,436
Fixed wing services    
Disaggregation of Revenue [Line Items]    
Revenue 25,942 24,654
Other services    
Disaggregation of Revenue [Line Items]    
Revenue $ 3,019 $ 3,665