Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' INVESTMENT, EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Narrative (Details)

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STOCKHOLDERS' INVESTMENT, EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Narrative (Details) - USD ($)
12 Months Ended
Jun. 11, 2020
Mar. 31, 2021
Sep. 16, 2020
Jun. 10, 2020
Mar. 31, 2020
Oct. 31, 2019
Class of Stock [Line Items]            
Common stock, shares outstanding (in shares)   29,694,071   11,092,845 11,235,566  
Mezzanine equity, initial fair value           $ 618,900,000
Derivative liability           470,300,000
Mezzanine equity, fair value           148,600,000
Common stock [1]   $ 303,000     $ 1,000  
Preferred stock, shares issued (in shares)       6,725,798    
Common stock, shares issued (in shares) 30,882,471     11,092,845    
Preferred stock, shares outstanding (in shares)       6,725,798    
Conversion rate of stock (in shares) 5.179562          
Stock repurchase program, authorized amount   $ 75,000,000.0 $ 75,000,000.0      
Stock repurchased (in shares)   448,252        
Stock repurchased during period   $ 10,000,000.0        
Stock repurchased during period (in dollars per share)   $ 22.29        
Stock repurchase program, remaining authorized repurchase amount   $ 65,000,000.0        
Restricted Stock Awards            
Class of Stock [Line Items]            
Shares canceled (in shares) 217,899          
Shares vested, accelerated (in shares) 145,604          
Stock options            
Class of Stock [Line Items]            
Options canceled (in shares) 145,263          
Legacy Bristow stockholders            
Class of Stock [Line Items]            
Common stock, shares issued (in shares) 24,195,693          
Carrying amount            
Class of Stock [Line Items]            
Derivative liability           270,800,000
Common stock           $ 270,700,000
[1] Share information displayed as of March 31, 2020 does not take into account the impact of the Merger.