Quarterly report pursuant to Section 13 or 15(d)

VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - Statements of Operations of VIEs (Details)

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VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - Statements of Operations of VIEs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Variable Interest Entity [Line Items]        
Revenue $ 304,640 $ 318,220 $ 574,833 $ 651,396
Net income (loss) (27,992) (162,919) 43,412 (332,007)
VIE, primary beneficiary | Bristow Aviation Holdings Limited        
Variable Interest Entity [Line Items]        
Revenue 223,232 276,568 448,851 571,723
Operating income (loss) 259,435 (13,692) 276,726 (2,412)
Net income (loss) $ 182,542 $ (21,034) $ 121,207 $ (383,882)