Quarterly report pursuant to Section 13 or 15(d)

REVENUES - Remaining Performance Obligations (Details)

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REVENUES - Remaining Performance Obligations (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount $ 890,687
Helicopter contracts  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount 889,846
Fixed wing contracts  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, amount $ 841