CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (77,149,000)	$ 88,707,000	$ 187,779,000
Other comprehensive income:
Currency translation adjustments	(21,604,000)	(71,617,000)	18,729,000
Pension liability adjustment, net of tax provision (benefit)	705,000	(36,978,000)	23,367,000
Total comprehensive income (loss)	(98,048,000)	(19,888,000)	229,875,000
Net (income) loss attributable to noncontrolling interests	4,707,000	(4,407,000)	(1,042,000)
Currency translation adjustment attributable to noncontrolling interest	1,409,000	(5,228,000)	1,081,000
Total comprehensive (income) loss attributable to noncontrolling interests	6,116,000	(9,635,000)	39,000
Total comprehensive income (loss) attributable to Bristow Group	(91,932,000)	(29,523,000)	229,914,000
Accretion of redeemable noncontrolling interests	(1,498,000)	0	0
Total comprehensive income (loss) attributable to common stockholders	$ (93,430,000)	$ (29,523,000)	$ 229,914,000