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 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Disaggregation of Revenue [Line Items]        
Revenue $ 307,270 $ 301,584 $ 609,007 $ 602,186
Service        
Disaggregation of Revenue [Line Items]        
Revenue 299,391 290,120 593,539 578,471
Oil and gas services        
Disaggregation of Revenue [Line Items]        
Revenue 197,076 193,681 392,156 383,465
Government services        
Disaggregation of Revenue [Line Items]        
Revenue 69,908 69,742 140,015 140,184
Fixed wing services        
Disaggregation of Revenue [Line Items]        
Revenue 28,945 23,501 54,887 48,057
Other services        
Disaggregation of Revenue [Line Items]        
Revenue $ 3,462 $ 3,196 $ 6,481 $ 6,765