CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (176,890)	$ (77,149)	$ 88,707
Other comprehensive loss:
Currency translation adjustments	(21,636)	(21,604)	(71,617)
Pension liability adjustment, net of tax provision	(11,511)	705	(36,978)
Total comprehensive loss	(210,037)	(98,048)	(19,888)
Net (income) loss attributable to noncontrolling interests	6,354	4,707	(4,407)
Currency translation adjustments attributable to noncontrolling interests	(5,311)	1,409	(5,228)
Total comprehensive (income) loss attributable to noncontrolling interests	1,043	6,116	(9,635)
Total comprehensive loss attributable to Bristow Group	(208,994)	(91,932)	(29,523)
Accretion of redeemable noncontrolling interests	0	(1,498)	0
Total comprehensive loss attributable to common stockholders	$ (208,994)	$ (93,430)	$ (29,523)