Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2016	Jan. 27, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
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		35,095,759
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3