Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Entity Registrant Name	Bristow Group Inc.
Entity Central Index Key	0000073887
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		34,920,082
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1