Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' INVESTMENT, EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Computation of Basic and Diluted EPS (Details)

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STOCKHOLDERS' INVESTMENT, EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Computation of Basic and Diluted EPS (Details) - USD ($)
$ / shares in Units, $ in Thousands
5 Months Ended 7 Months Ended 12 Months Ended
Mar. 31, 2020
Oct. 31, 2019
Mar. 31, 2021
Mar. 31, 2019
Debt Instrument [Line Items]        
Net income (loss) attributable to Bristow Group Inc. $ 139,228 $ (836,414) $ (56,094) $ (336,847)
Less: PIK dividends (25,788) 0 (12,039) 0
Plus: Deemed contribution from conversion of preferred stock 0 0 144,986 0
Income available to common stockholders – basic 113,440 (836,414) 76,853 (336,847)
Add: PIK dividends 25,788 0 12,039 0
Less: Changes in fair value of preferred stock derivative liability (184,140) 0 (15,416) 0
Income available to common stockholders – diluted $ (44,912) $ (836,414) $ 73,476 $ (336,847)
Weighted average number of common shares outstanding – basic (in shares) [1] 5,641,320 35,918,916 24,601,168 35,740,933
Effect of dilutive stock options and restricted stock (in shares) 0 0 179,900 0
Preferred shares as converted basis (in shares) 24,164,661 0 6,894,870 0
Weighted average number of common shares outstanding – diluted (in shares) [1] 29,805,981 35,918,916 31,675,938 35,740,933
Earnings (loss) per common share - basic (in dollars per share) [1] $ 20.11 $ (23.29) $ 3.12 $ (9.42)
Earnings (loss) per common share - diluted (in dollars per share) [1] $ (1.51) $ (23.29) $ 2.32 $ (9.42)
Weighted average common shares excluded from computation (in shares)   3,175,849 135,882 2,490,483
4½% Convertible Senior Notes due 2023 | Convertible Debt        
Debt Instrument [Line Items]        
Stated interest rate     4.50%  
[1] See Note 12 to the consolidated financial statements for details on income (loss) per share and weighted average common shares outstanding.