SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OCI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Net income	$ 109,884	$ 30,434	$ 136,796	$ 54,630
Currency translation adjustments	15,874	4,222	11,445	4,728
Other comprehensive income	125,758	34,656	148,241	59,358
Net income attributable to noncontrolling interests	722	(766)	696	(1,300)
Currency translation adjustment attributable to noncontrolling interest	(108)	99	(238)	(102)
Total comprehensive income attributable to noncontrolling interests	614	(667)	458	(1,402)
Total comprehensive income attributable to Bristow Group	126,372	33,989	148,699	57,956
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	110,620	29,684	137,523	53,365
Currency translation adjustments	3,105	1,907	4,025	4,580
Other comprehensive income	113,725	31,591	141,548	57,945
Net income attributable to noncontrolling interests	(14)	(16)	(31)	(35)
Currency translation adjustment attributable to noncontrolling interest	0	0	0	0
Total comprehensive income attributable to noncontrolling interests	(14)	(16)	(31)	(35)
Total comprehensive income attributable to Bristow Group	113,711	31,575	141,517	57,910
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	16,439	20,067	38,582	39,069
Currency translation adjustments	0	0	0	0
Other comprehensive income	16,439	20,067	38,582	39,069
Net income attributable to noncontrolling interests	0	0	0	0
Currency translation adjustment attributable to noncontrolling interest	0	0	0	0
Total comprehensive income attributable to noncontrolling interests	0	0	0	0
Total comprehensive income attributable to Bristow Group	16,439	20,067	38,582	39,069
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	120,983	1,759	130,599	1,011
Currency translation adjustments	(14,710)	(35,328)	(21,657)	(40,372)
Other comprehensive income	106,273	(33,569)	108,942	(39,361)
Net income attributable to noncontrolling interests	736	(750)	727	(1,265)
Currency translation adjustment attributable to noncontrolling interest	(108)	99	(238)	(102)
Total comprehensive income attributable to noncontrolling interests	628	(651)	489	(1,367)
Total comprehensive income attributable to Bristow Group	106,901	(34,220)	109,431	(40,728)
Consolidations, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	(138,158)	(21,076)	(169,908)	(38,815)
Currency translation adjustments	27,479	37,643	29,077	40,520
Other comprehensive income	(110,679)	16,567	(140,831)	1,705
Net income attributable to noncontrolling interests	0	0	0	0
Currency translation adjustment attributable to noncontrolling interest	0	0	0	0
Total comprehensive income attributable to noncontrolling interests	0	0	0	0
Total comprehensive income attributable to Bristow Group	$ (110,679)	$ 16,567	$ (140,831)	$ 1,705