SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net income	$ (1,629)	$ 45,003
Currency translation adjustments	12,608	8,237
Total comprehensive income	10,979	53,240
Net income attributable to noncontrolling interests	(1,628)	(894)
Currency translation adjustments attributable to noncontrolling interests	2,106	971
Total comprehensive income attributable to noncontrolling interests	478	77
Total comprehensive income attributable to Bristow Group	11,457	53,317
Accretion of redeemable noncontrolling interests	(6,301)	0
Total comprehensive income attributable to common stockholders	5,156	53,317
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	(3,243)	44,127
Currency translation adjustments	36,371	(7,036)
Total comprehensive income	33,128	37,091
Net income attributable to noncontrolling interests	(14)	(18)
Currency translation adjustments attributable to noncontrolling interests	0	0
Total comprehensive income attributable to noncontrolling interests	(14)	(18)
Total comprehensive income attributable to Bristow Group	33,114	37,073
Accretion of redeemable noncontrolling interests	0
Total comprehensive income attributable to common stockholders	33,114
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	1,132	27,577
Currency translation adjustments	0	0
Total comprehensive income	1,132	27,577
Net income attributable to noncontrolling interests	0	0
Currency translation adjustments attributable to noncontrolling interests	0	0
Total comprehensive income attributable to noncontrolling interests	0	0
Total comprehensive income attributable to Bristow Group	1,132	27,577
Accretion of redeemable noncontrolling interests	0
Total comprehensive income attributable to common stockholders	1,132
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	(14,952)	10,291
Currency translation adjustments	(86,867)	(20,399)
Total comprehensive income	(101,819)	(10,108)
Net income attributable to noncontrolling interests	(1,614)	(876)
Currency translation adjustments attributable to noncontrolling interests	2,106	971
Total comprehensive income attributable to noncontrolling interests	492	95
Total comprehensive income attributable to Bristow Group	(101,327)	(10,013)
Accretion of redeemable noncontrolling interests	(6,301)
Total comprehensive income attributable to common stockholders	(107,628)
Consolidations, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	15,434	(36,992)
Currency translation adjustments	63,104	35,672
Total comprehensive income	78,538	(1,320)
Net income attributable to noncontrolling interests	0	0
Currency translation adjustments attributable to noncontrolling interests	0	0
Total comprehensive income attributable to noncontrolling interests	0	0
Total comprehensive income attributable to Bristow Group	78,538	$ (1,320)
Accretion of redeemable noncontrolling interests	0
Total comprehensive income attributable to common stockholders	$ 78,538