Bristow Group Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

DEBT - Narrative (Details)

DEBT - Narrative (Details)							1 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
DEBT - Narrative (Details)	Aug. 18, 2020 USD ($)	Jun. 11, 2020 USD ($)	Jul. 17, 2017 USD ($) day loan interestRateSwap	Feb. 01, 2017 USD ($)	Nov. 11, 2016 USD ($) loan	Dec. 07, 2012 USD ($)	Feb. 28, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2010 promissoryNote	Jun. 30, 2020 USD ($)	Apr. 17, 2018 subsidiary	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Cash paid for interest expense											$ 32,300,000
Unamortized debt issuance costs											8,500,000
Repayments of debt							$ 484,700,000		$ 25,132,000	$ 366,750,000	618,140,000	$ 61,052,000
Loss on extinguishment of debt									0	$ 0	29,359,000	$ 0
Long-term debt									515,385,000		527,528,000
Long-term debt, gross											573,593,000
Long-term debt									561,124,000		$ 543,493,000
Senior Notes \| 6.875% Senior Notes
Debt Instrument [Line Items]
Stated interest rate							6.875%				6.875%
Face amount							$ 400,000,000.0
Proceeds from issuance of long-term debt							395,000,000.0
Unamortized debt issuance costs											$ 8,500,000
Long-term debt									0		$ 391,550,000
Senior Notes \| 7.750% Senior Notes
Debt Instrument [Line Items]
Stated interest rate						7.75%					7.75%
Face amount						$ 200,000,000.0
Proceeds from issuance of long-term debt						$ 191,900,000
Loss on extinguishment of debt							28,500,000
Interest expense, debt											$ 7,600,000
Long-term debt									144,000,000.0					$ 136,800,000
Repurchased debt											144,100,000
Secured Debt
Debt Instrument [Line Items]
Number of promissory notes \| promissoryNote													2
Secured Debt \| PK Air Debt
Debt Instrument [Line Items]
Face amount			$ 230,000,000
Repayments of debt							200,700,000				19,200,000
Debt instruments, number of agreements \| loan			24
Basis spread on variable rate			5.00%
Number of days before term loan to adjust costs of funds \| day			2
Number of interest rate swaps \| interestRateSwap			12
Term of interest rate swap			30 days
Interest expense, debt											10,700,000
Long-term debt									207,326,000		0
Secured Debt \| Macquarie Debt
Debt Instrument [Line Items]
Face amount				$ 200,000,000
Repayments of debt							$ 152,000,000.0				7,200,000
Basis spread on variable rate				5.35%
Interest expense, debt											8,000,000.0
Debt instrument term				5 years
Long-term debt									148,165,000		0
Secured Debt \| Lombard Debt
Debt Instrument [Line Items]
Face amount					$ 200,000,000
Repayments of debt											12,800,000
Debt instruments, number of agreements \| loan					2
Basis spread on variable rate					2.25%
Interest expense, debt											4,100,000
Debt instrument term					7 years
Long-term debt									136,180,000		146,006,000
Secured Debt \| Promissory Note One
Debt Instrument [Line Items]
Repayments of debt								$ 12,700,000
Long-term debt, gross																$ 19,000,000.0
Secured Debt \| Promissory Note Two
Debt Instrument [Line Items]
Repayments of debt								$ 4,000,000.0
Long-term debt, gross																$ 5,900,000
Term Loan
Debt Instrument [Line Items]
Repayments of debt		$ 61,500,000
Prepayment of premium		$ 600,000
Long-term debt									$ 61,500,000		0
Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Number of borrowers \| subsidiary															2
Line of credit increase, last in, last out tranche	$ 5,000,000.0
Maximum borrowing capacity	80,000,000.0
Maximum borrowing capacity increase	$ 115,000,000.0
Long-term debt											0
ABR Rate \| Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
ABR Rate \| Line of Credit \| Asset Backed Revolving Credit Facility, Swingline Loan
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
LIBOR or NIBOR \| Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Letter of Credit \| Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Maximum borrowing capacity											$ 19,400,000