SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OCI (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net income	$ 187,779	$ 131,675	$ 65,241
Currency translation adjustments	18,729	(11,982)	905
Pension liability adjustment, net of tax	23,367	(28,462)	(27,877)
Unrealized loss on cash flow hedges, net	0	0	(2,150)
Other comprehensive income	229,875	91,231	36,119
Net income attributable to noncontrolling interests	(1,042)	(1,573)	(1,711)
Currency Translation Adjustment Attributable to Noncontrolling Interest and Temporary Equity	(1,081)	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	39	(1,573)	(1,711)
Total comprehensive income attributable to Bristow Group	229,914	89,658	34,408
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	186,797	130,165	63,595
Currency translation adjustments	8,173	(1,186)	1,480
Pension liability adjustment, net of tax	0	0	0
Unrealized loss on cash flow hedges, net			0
Other comprehensive income	194,970	128,979	65,075
Net income attributable to noncontrolling interests	(60)	(63)	(65)
Currency Translation Adjustment Attributable to Noncontrolling Interest and Temporary Equity	0
Total comprehensive (income) loss attributable to noncontrolling interests	(60)	(63)	(65)
Total comprehensive income attributable to Bristow Group	194,910	128,916	65,010
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	71,509	86,782	62,101
Currency translation adjustments	0	0	0
Pension liability adjustment, net of tax	0	0	0
Unrealized loss on cash flow hedges, net			0
Other comprehensive income	71,509	86,782	62,101
Net income attributable to noncontrolling interests	0	0	0
Currency Translation Adjustment Attributable to Noncontrolling Interest and Temporary Equity	0
Total comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Total comprehensive income attributable to Bristow Group	71,509	86,782	62,101
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	118,639	38,314	(18,829)
Currency translation adjustments	(40,402)	(6,383)	(13,037)
Pension liability adjustment, net of tax	23,367	(28,462)	(27,877)
Unrealized loss on cash flow hedges, net			(2,150)
Other comprehensive income	101,604	3,469	(61,893)
Net income attributable to noncontrolling interests	(982)	(1,510)	(1,646)
Currency Translation Adjustment Attributable to Noncontrolling Interest and Temporary Equity	(1,081)
Total comprehensive (income) loss attributable to noncontrolling interests	99	(1,510)	(1,646)
Total comprehensive income attributable to Bristow Group	101,703	1,959	(63,539)
Consolidations, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	(189,166)	(123,586)	(41,626)
Currency translation adjustments	50,958	(4,413)	12,462
Pension liability adjustment, net of tax	0	0	0
Unrealized loss on cash flow hedges, net			0
Other comprehensive income	(138,208)	(127,999)	(29,164)
Net income attributable to noncontrolling interests	0	0	0
Currency Translation Adjustment Attributable to Noncontrolling Interest and Temporary Equity	0
Total comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Total comprehensive income attributable to Bristow Group	$ (138,208)	$ (127,999)	$ (29,164)