CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (198,083)	$ (176,890)	$ (77,149)
Other comprehensive loss:
Currency translation adjustments	25,927	(21,636)	(21,604)
Pension liability adjustment, net of tax (benefit) provision of ($2.6 million), $4.0 million and $4.4 million, respectively	12,333	(11,511)	705
Unrealized loss on cash flow hedges, net of tax benefit of $0.1 million, zero and zero, respectively	(346)	0	0
Total comprehensive loss	(160,169)	(210,037)	(98,048)
Net loss attributable to noncontrolling interests	2,425	6,354	4,707
Currency translation adjustments attributable to noncontrolling interests	4,269	(5,311)	1,409
Total comprehensive loss attributable to noncontrolling interests	6,694	1,043	6,116
Total comprehensive loss attributable to Bristow Group	(153,475)	(208,994)	(91,932)
Accretion of redeemable noncontrolling interests	0	0	(1,498)
Total comprehensive loss attributable to common stockholders	$ (153,475)	$ (208,994)	$ (93,430)