SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION IS (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Gross revenue	$ 330,992	$ 312,559	$ 652,097	$ 604,797
Intercompany revenue	0	0	0	0
Total consolidated gross revenue	330,992	312,559	652,097	604,797
Direct cost and reimbursable expense	236,405	214,130	466,161	417,472
Intercompany expenses	0	0	0	0
Impairment of inventories	24,610	0	24,610	0
Depreciation and amortization	25,431	20,968	48,139	40,299
General and administrative	29,303	30,515	68,948	61,417
Total operating expense	315,749	265,613	607,858	519,188
Gain on disposal of assets	(1,611)	1,897	(195)	3,615
Earnings from unconsolidated affiliates, net of losses	(4,037)	4,716	1,956	4,014
Operating income	9,595	53,559	46,000	93,238
Interest income	153	168	324	460
Interest expense	(9,459)	(11,452)	(18,414)	(22,490)
Other income (expense), net	727	(111)	931	404
Income before provision for income taxes	1,016	42,164	28,841	71,612
Benefit (provision) for income taxes	1,945	(3,316)	(4,661)	(11,856)
Net income	2,961	38,848	24,180	59,756
Net income attributable to noncontrolling interests	(250)	32	(424)	(68)
Net income attributable to Bristow Group	2,711	38,880	23,756	59,688
Parent Company [Member]
Gross revenue	0	0	0	0
Intercompany revenue	1,555	0	1,555	0
Total consolidated gross revenue	1,555	0	1,555	0
Direct cost and reimbursable expense	730	(477)	0	(940)
Intercompany expenses	0	0	0	0
Impairment of inventories	0		0
Depreciation and amortization	916	575	1,759	1,139
General and administrative	7,626	5,847	21,801	17,327
Total operating expense	9,272	5,945	23,560	17,526
Gain on disposal of assets	0	0	0	0
Earnings from unconsolidated affiliates, net of losses	(7,074)	33,477	15,145	62,709
Operating income	(14,791)	27,532	(6,860)	45,183
Interest income	24,286	20,887	47,589	39,782
Interest expense	(9,538)	(11,373)	(18,797)	(22,057)
Other income (expense), net	47	(33)	61	(16)
Income before provision for income taxes	4	37,013	21,993	62,892
Benefit (provision) for income taxes	2,722	1,883	1,793	(3,173)
Net income	2,726	38,896	23,786	59,719
Net income attributable to noncontrolling interests	(15)	(16)	(30)	(31)
Net income attributable to Bristow Group	2,711	38,880	23,756	59,688
Guarantor Subsidiaries [Member]
Gross revenue	69,152	79,283	136,349	154,010
Intercompany revenue	12,106	5,890	23,879	17,871
Total consolidated gross revenue	81,258	85,173	160,228	171,881
Direct cost and reimbursable expense	40,743	48,044	83,704	99,783
Intercompany expenses	0	0	0	0
Impairment of inventories	8,778		8,778
Depreciation and amortization	10,904	7,583	19,086	15,742
General and administrative	4,596	6,526	11,359	11,194
Total operating expense	65,021	62,153	122,927	126,719
Gain on disposal of assets	(427)	894	(247)	1,852
Earnings from unconsolidated affiliates, net of losses	0	0	0	0
Operating income	15,810	23,914	37,054	47,014
Interest income	10	22	180	33
Interest expense	0	(68)	0	(68)
Other income (expense), net	126	(92)	192	(117)
Income before provision for income taxes	15,946	23,776	37,426	46,862
Benefit (provision) for income taxes	(2,483)	(2,753)	(5,146)	(4,602)
Net income	13,463	21,023	32,280	42,260
Net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to Bristow Group	13,463	21,023	32,280	42,260
Non-Guarantor Subsidiaries [Member]
Gross revenue	261,840	233,276	515,748	450,787
Intercompany revenue	0	0	0	0
Total consolidated gross revenue	261,840	233,276	515,748	450,787
Direct cost and reimbursable expense	194,932	166,563	382,457	318,629
Intercompany expenses	13,661	5,890	25,434	17,871
Impairment of inventories	15,832		15,832
Depreciation and amortization	13,611	12,810	27,294	23,418
General and administrative	17,081	18,142	35,788	32,896
Total operating expense	255,117	203,405	486,805	392,814
Gain on disposal of assets	(1,184)	1,003	52	1,763
Earnings from unconsolidated affiliates, net of losses	(4,037)	5,030	1,956	4,706
Operating income	1,502	35,904	30,951	64,442
Interest income	139	140	301	424
Interest expense	(24,203)	(20,892)	(47,363)	(40,144)
Other income (expense), net	554	14	678	537
Income before provision for income taxes	(22,008)	15,166	(15,433)	25,259
Benefit (provision) for income taxes	1,706	(2,446)	(1,308)	(4,081)
Net income	(20,302)	12,720	(16,741)	21,178
Net income attributable to noncontrolling interests	(235)	48	(394)	(37)
Net income attributable to Bristow Group	(20,537)	12,768	(17,135)	21,141
Consolidations, Eliminations [Member]
Gross revenue	0	0	0	0
Intercompany revenue	(13,661)	(5,890)	(25,434)	(17,871)
Total consolidated gross revenue	(13,661)	(5,890)	(25,434)	(17,871)
Direct cost and reimbursable expense	0	0	0	0
Intercompany expenses	(13,661)	(5,890)	(25,434)	(17,871)
Impairment of inventories	0		0
Depreciation and amortization	0	0	0	0
General and administrative	0	0	0	0
Total operating expense	(13,661)	(5,890)	(25,434)	(17,871)
Gain on disposal of assets	0	0	0	0
Earnings from unconsolidated affiliates, net of losses	7,074	(33,791)	(15,145)	(63,401)
Operating income	7,074	(33,791)	(15,145)	(63,401)
Interest income	(24,282)	(20,881)	(47,746)	(39,779)
Interest expense	24,282	20,881	47,746	39,779
Other income (expense), net	0	0	0	0
Income before provision for income taxes	7,074	(33,791)	(15,145)	(63,401)
Benefit (provision) for income taxes	0	0	0	0
Net income	7,074	(33,791)	(15,145)	(63,401)
Net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to Bristow Group	$ 7,074	$ (33,791)	$ (15,145)	$ (63,401)