Quarterly report pursuant to Section 13 or 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 ($)
3 Months Ended 9 Months Ended
Jun. 11, 2020
Dec. 31, 2020
Dec. 31, 2020
Sep. 16, 2020
Jun. 10, 2020
Mar. 31, 2020
Oct. 31, 2019
Class of Stock [Line Items]              
Common stock, shares outstanding (in shares)   29,710,476 29,710,476   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 $ 303,000     $ 1,000  
Preferred stock, shares issued (in shares)         6,725,798    
Conversion rate of stock (in shares) 5.179562            
Common stock, shares issued (in shares) 30,882,471       11,092,845    
Preferred stock, shares outstanding (in shares)         6,725,798    
Stock repurchase program, authorized amount   $ 75,000,000.0 $ 75,000,000.0 $ 75,000,000.0      
Stock repurchased (in shares)   102,925 448,252        
Stock repurchased during period   $ 2,400,000 $ 10,000,000.0        
Stock repurchased during period (in dollars per share)   $ 23.49 $ 22.29        
Stock repurchase program, remaining authorized repurchase amount   $ 65,000,000.0 $ 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.