Bristow Group Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

DEBT - Narrative (Details)

DEBT - Narrative (Details)			1 Months Ended	3 Months Ended		12 Months Ended
DEBT - Narrative (Details)	Jun. 11, 2020 USD ($)	Dec. 07, 2012 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2010 USD ($) promissory_note	Jun. 04, 2020 USD ($)	Mar. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	May 11, 2019	Apr. 17, 2018 USD ($) subsidiary	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Repayments of debt				$ 73,387,000	$ 5,821,000
Long-term debt			$ 645,805,000	645,805,000				$ 561,124,000
Total long-term debt			582,264,000	582,264,000				515,385,000
Write off of debt issuance costs				0	2,625,000
Secured Debt
Debt Instrument [Line Items]
Long-term debt			17,485,000	17,485,000				0
Number of promissory notes \| promissory_note						2
Periodic payment				100,000
Reduction of final payment				100,000
Secured Debt \| PK Air Debt
Debt Instrument [Line Items]
Repayments of debt				5,300,000
Long-term debt			202,811,000	202,811,000				207,326,000
Secured Debt \| Macquarie Debt
Debt Instrument [Line Items]
Repayments of debt				2,400,000
Long-term debt			146,695,000	146,695,000				148,165,000
Secured Debt \| Lombard Debt
Debt Instrument [Line Items]
Repayments of debt				3,000,000.0
Long-term debt			$ 134,468,000	134,468,000				136,180,000
Secured Debt \| Promissory Note One
Debt Instrument [Line Items]
Long-term debt, gross						$ 27,000,000.0						$ 19,000,000.0
Final payment				12,800,000
Secured Debt \| Promissory Note Two
Debt Instrument [Line Items]
Long-term debt, gross						$ 11,700,000						$ 5,900,000
Final payment				$ 4,000,000.0
Senior Notes \| 7.750% Senior Notes
Debt Instrument [Line Items]
Stated interest rate		7.75%	7.75%	7.75%
Face amount		$ 200,000,000.0
Proceeds from issuance of long-term debt		$ 191,900,000
Long-term debt			$ 136,840,000	$ 136,840,000				0
Total long-term debt			136,800,000	136,800,000
Write off of debt issuance costs			1,100,000
Write-off of unamortized discount			800,000
Term Loan
Debt Instrument [Line Items]
Repayments of debt	$ 61,500,000
Long-term debt			$ 0	$ 0				$ 61,500,000
Prepayment of premium	$ 600,000
Convertible Debt \| 4½% Convertible Senior Notes due 2023
Debt Instrument [Line Items]
Stated interest rate			4.50%	4.50%
Effective percentage										11.00%
Contractual interest expense					1,600,000
Increase in accrued interest					$ 900,000
Revolving Credit Facility \| ABL Facility
Debt Instrument [Line Items]
Number of borrowers \| subsidiary											2
Current borrowing capacity											$ 75,000,000
Availability block capacity											15,000,000
Maximum borrowing capacity									$ 115,000,000		$ 100,000,000
Outstanding borrowings			$ 0	$ 0
Aggregate face amount outstanding			10,000,000.0	10,000,000.0
Revolving Credit Facility \| ABL Facility \| Minimum
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 80,000,000
Revolving Credit Facility \| ABL Facility \| Maximum
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 85,000,000
Carrying amount \| Senior Notes \| 7.750% Senior Notes
Debt Instrument [Line Items]
Long-term debt			$ 144,100,000	$ 144,100,000