CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (336,138)	$ (197,109)	$ (175,916)
Other comprehensive loss:
Currency translation adjustments	(36,382)	25,927	(21,636)
Pension liability adjustment, net of tax (benefit) provision of ($1.6 million), ($2.6 million), and $4.0 million, respectively	(5,291)	12,333	(11,511)
Unrealized loss on cash flow hedges, net of tax (benefit) provision of $0.1 million, ($0.1 million) and zero, respectively	(42)	(346)	0
Total comprehensive loss	(377,853)	(159,195)	(209,063)
Net (income) loss attributable to noncontrolling interests	(709)	2,425	6,354
Currency translation adjustments attributable to noncontrolling interests	(180)	4,269	(5,311)
Total comprehensive (income) loss attributable to noncontrolling interests	(889)	6,694	1,043
Total comprehensive loss attributable to Bristow Group	$ (378,742)	$ (152,501)	$ (208,020)