Annual report pursuant to Section 13 and 15(d)

VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - Narrative (Details)

v3.22.1
VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - Narrative (Details)
$ in Thousands, £ in Millions
1 Months Ended 5 Months Ended 7 Months Ended 12 Months Ended
May 10, 2019
GBP (£)
Jun. 30, 2019
USD ($)
Apr. 30, 2019
USD ($)
Mar. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Mar. 31, 2022
USD ($)
affiliates
Mar. 31, 2021
USD ($)
affiliates
Variable Interest Entity [Line Items]              
Number of variable interest entities | affiliates           6 6
Loss on sale of subsidiaries       $ 0 $ 55,883 $ 2,002 $ 0
Sale of subsidiaries         5,612 $ 1,572  
BNAS              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           100.00%  
Bristow Aviation Holdings Limited | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           49.00%  
Bristow Helicopters Nigeria Ltd | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           48.00%  
Pan African Airlines Nigeria Ltd | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           50.17%  
Eastern Airways              
Variable Interest Entity [Line Items]              
Contributions to noncontrolling interest | £ £ 17.1            
Loss on sale of subsidiaries         46,900    
Write off of net assets         35,000    
Write off of cumulative translation adjustment         11,900    
Hauser Investments Limited              
Variable Interest Entity [Line Items]              
Noncontrolling ownership percentage           75.00%  
Bristow Helicopters Limited | BNAS Holdings | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           49.00%  
European Union (“EU”) National | BNAS Holdings | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           51.00%  
Impigra Aviation Holdings Limited | Bristow Aviation Holdings Limited              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           51.00%  
Impigra Aviation Holdings Limited | Bristow Aviation Holdings Limited | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           51.00%  
YII 5668 Energy | Bristow Helicopters Nigeria Ltd              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           50.00%  
Nigerian Employees | YII 5668 Energy              
Variable Interest Entity [Line Items]              
Noncontrolling ownership percentage           100.00%  
British Employees | Impigra Aviation Holdings Limited              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           100.00%  
Employee Trust Fund | Bristow Helicopters Nigeria Ltd              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           2.00%  
Old Bristow | BHLL              
Variable Interest Entity [Line Items]              
Sale of noncontrolling interest, percentage     60.00%        
Sale of subsidiaries     $ 1,400        
Old Bristow | Aviashelf Aviation Co.              
Variable Interest Entity [Line Items]              
Loss on sale of subsidiaries         $ 9,000    
Sale of noncontrolling interest, percentage   48.50%          
Sale of subsidiaries   $ 2,600          
Hauser Investments Limited | Sicher Helicopters SAS              
Variable Interest Entity [Line Items]              
Noncontrolling ownership percentage           100.00%  
Republic Of Ireland | BNAS Holdings | VIE, primary beneficiary              
Variable Interest Entity [Line Items]              
Ownership percentage in Variable Interest Entity           49.00%