SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (26,048)	$ 3,568	$ (97,227)	$ (43,741)
Other comprehensive loss:
Currency translation adjustments	(18,896)	(3,639)	(31,470)	(7,981)
Total comprehensive income (loss)	(44,944)	(71)	(128,697)	(51,722)
Net (income) loss attributable to noncontrolling interests	4,121	(366)	4,731	(3,446)
Currency translation adjustments attributable to noncontrolling interests	(687)	(605)	(5,652)	(34)
Total comprehensive (income) loss attributable to noncontrolling interests	3,434	(971)	(921)	(3,480)
Total comprehensive income (loss) attributable to Bristow Group	(41,510)	(1,042)	(129,618)	(55,202)
Accretion of redeemable noncontrolling interests	0	0	0	(1,498)
Total comprehensive income (loss) attributable to common stockholders	(41,510)	(1,042)	(129,618)	(56,700)
Consolidations, Eliminations
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(4,561)	796	17,905	90,223
Other comprehensive loss:
Currency translation adjustments	(7,104)	4,707	(227,912)	(33,067)
Total comprehensive income (loss)	(11,665)	5,503	(210,007)	57,156
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Currency translation adjustments attributable to noncontrolling interests	0	0	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	0	0	0	0
Total comprehensive income (loss) attributable to Bristow Group	(11,665)	5,503	(210,007)	57,156
Accretion of redeemable noncontrolling interests				0
Total comprehensive income (loss) attributable to common stockholders				57,156
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(21,913)	3,216	(92,455)	(47,145)
Other comprehensive loss:
Currency translation adjustments	0	(31,902)	0	(38,773)
Total comprehensive income (loss)	(21,913)	(28,686)	(92,455)	(85,918)
Net (income) loss attributable to noncontrolling interests	(13)	(14)	(40)	(42)
Currency translation adjustments attributable to noncontrolling interests	0	0	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	(13)	(14)	(40)	(42)
Total comprehensive income (loss) attributable to Bristow Group	(21,926)	(28,700)	(92,495)	(85,960)
Accretion of redeemable noncontrolling interests				0
Total comprehensive income (loss) attributable to common stockholders				(85,960)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	6,905	12,724	(13,417)	6,203
Other comprehensive loss:
Currency translation adjustments	0	0	0	0
Total comprehensive income (loss)	6,905	12,724	(13,417)	6,203
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Currency translation adjustments attributable to noncontrolling interests	0	0	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	0	0	0	0
Total comprehensive income (loss) attributable to Bristow Group	6,905	12,724	(13,417)	6,203
Accretion of redeemable noncontrolling interests				0
Total comprehensive income (loss) attributable to common stockholders				6,203
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(6,479)	(13,168)	(9,260)	(93,022)
Other comprehensive loss:
Currency translation adjustments	(11,792)	23,556	196,442	63,859
Total comprehensive income (loss)	(18,271)	10,388	187,182	(29,163)
Net (income) loss attributable to noncontrolling interests	4,134	(352)	4,771	(3,404)
Currency translation adjustments attributable to noncontrolling interests	(687)	(605)	(5,652)	(34)
Total comprehensive (income) loss attributable to noncontrolling interests	3,447	(957)	(881)	(3,438)
Total comprehensive income (loss) attributable to Bristow Group	$ (14,824)	$ 9,431	$ 186,301	(32,601)
Accretion of redeemable noncontrolling interests				(1,498)
Total comprehensive income (loss) attributable to common stockholders				$ (34,099)