FAIR VALUE DISCLOSURES - Fair Value of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	$ 1,545,396	$ 1,448,624
Fair value of total debt	1,105,922	942,956
Senior Notes \| 8.75% Senior Secured Notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	347,597	347,400
Fair value of total debt	339,500	252,000
Unamortized discount	2,400	2,600
Senior Notes \| 6¼% Senior Notes due 2022 (1)(2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	401,535	401,535
Fair value of total debt	83,720	75,288
Convertible Debt \| 4½% Convertible Senior Notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	143,750	112,944
Fair value of total debt	30,188	28,923
Unamortized discount	0	30,806
Secured Debt \| Lombard Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	176,094	183,450
Fair value of total debt	176,094	183,450
Secured Debt \| Macquarie Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	171,028	171,028
Fair value of total debt	171,028	171,028
Secured Debt \| PK Air Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	210,494	212,041
Fair value of total debt	210,494	212,041
Other Debt \| Airnorth Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	10,146	11,058
Fair value of total debt	10,146	11,058
Other Debt \| Humberside Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	382	0
Fair value of total debt	382	0
Other Debt \| Other Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	9,370	9,168
Fair value of total debt	9,370	9,168
Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt component - net carrying value	75,000	0
Fair value of total debt	$ 75,000	$ 0

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

+ Details

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_SeniorSecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_SeniorNotesDue2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_ConvertibleSeniorNotesdue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_LombardDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_MacquarieDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_PKAirDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=brs_OtherDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_AirnorthDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_EasternAirwaysDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brs_OtherDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=brs_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: