SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION IS (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]
Total consolidated gross revenue	$ 417,328	$ 365,754	$ 816,322	$ 728,362
Direct cost and reimbursable expense	293,080	263,129	585,079	526,069
Intercompany expenses	0	0	0	0
Depreciation and amortization	23,858	23,321	46,677	44,693
General and administrative	46,479	37,708	86,787	72,685
Operating expense	363,417	324,158	718,543	643,447
Gain (loss) on disposal of assets	(3,064)	(1,262)	(4,785)	(6,577)
Earnings from unconsolidated affiliates, net of losses	3,088	6,994	17,060	8,983
Operating income	53,935	47,328	110,054	87,321
Interest income	762	263	881	351
Interest expense	(9,078)	(8,597)	(29,448)	(17,371)
Gain on sale of unconsolidated affiliate	103,924	0	103,924	0
Other income (expense), net	1,487	(218)	121	(1,149)
Income before provision for income taxes	151,030	38,776	185,532	69,152
Provision for income taxes	(41,146)	(8,342)	(48,736)	(14,522)
Net income	109,884	30,434	136,796	54,630
Net income attributable to noncontrolling interests	722	(766)	696	(1,300)
Net income attributable to Bristow Group	110,606	29,668	137,492	53,330
External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	417,328	365,754	816,322	728,362
Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0	0	0
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	374	578	748	1,156
Direct cost and reimbursable expense	0	0	0	0
Intercompany expenses	0	0	0	0
Depreciation and amortization	736	1,091	1,453	2,160
General and administrative	14,343	11,218	26,133	20,147
Operating expense	15,079	12,309	27,586	22,307
Gain (loss) on disposal of assets	0	0	0	0
Earnings from unconsolidated affiliates, net of losses	138,158	21,076	169,908	38,815
Operating income	123,453	9,345	143,070	17,664
Interest income	31,502	28,988	59,698	56,928
Interest expense	(9,598)	(9,171)	(30,193)	(18,021)
Gain on sale of unconsolidated affiliate	0		0
Other income (expense), net	(120)	(57)	(118)	(6)
Income before provision for income taxes	145,237	29,105	172,457	56,565
Provision for income taxes	(34,617)	579	(34,934)	(3,200)
Net income	110,620	29,684	137,523	53,365
Net income attributable to noncontrolling interests	(14)	(16)	(31)	(35)
Net income attributable to Bristow Group	110,606	29,668	137,492	53,330
Parent Company [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0	0	0
Parent Company [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	374	578	748	1,156
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	100,024	94,749	197,033	181,560
Direct cost and reimbursable expense	57,543	56,342	114,987	106,114
Intercompany expenses	0	0	0	0
Depreciation and amortization	11,048	9,348	21,731	17,423
General and administrative	8,574	7,361	16,159	14,212
Operating expense	77,165	73,051	152,877	137,749
Gain (loss) on disposal of assets	(2,927)	421	(1,539)	(998)
Earnings from unconsolidated affiliates, net of losses	0	0	0	0
Operating income	19,932	22,119	42,617	42,813
Interest income	0	8	0	17
Interest expense	(1,476)	0	(1,507)	0
Gain on sale of unconsolidated affiliate	0		0
Other income (expense), net	(174)	(36)	(160)	21
Income before provision for income taxes	18,282	22,091	40,950	42,851
Provision for income taxes	(1,843)	(2,024)	(2,368)	(3,782)
Net income	16,439	20,067	38,582	39,069
Net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to Bristow Group	16,439	20,067	38,582	39,069
Guarantor Subsidiaries [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	78,518	76,217	155,161	145,729
Guarantor Subsidiaries [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	21,506	18,532	41,872	35,831
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	338,810	289,537	661,161	582,633
Direct cost and reimbursable expense	235,537	206,787	470,092	419,955
Intercompany expenses	21,880	19,110	42,620	36,987
Depreciation and amortization	12,074	12,882	23,493	25,110
General and administrative	23,562	19,129	44,495	38,326
Operating expense	293,053	257,908	580,700	520,378
Gain (loss) on disposal of assets	(137)	(1,683)	(3,246)	(5,579)
Earnings from unconsolidated affiliates, net of losses	3,088	6,994	17,060	8,983
Operating income	48,708	36,940	94,275	65,659
Interest income	762	296	878	296
Interest expense	(29,506)	(28,455)	(57,443)	(56,240)
Gain on sale of unconsolidated affiliate	103,924		103,924
Other income (expense), net	1,781	(125)	399	(1,164)
Income before provision for income taxes	125,669	8,656	142,033	8,551
Provision for income taxes	(4,686)	(6,897)	(11,434)	(7,540)
Net income	120,983	1,759	130,599	1,011
Net income attributable to noncontrolling interests	736	(750)	727	(1,265)
Net income attributable to Bristow Group	121,719	1,009	131,326	(254)
Non-Guarantor Subsidiaries [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	338,810	289,537	661,161	582,633
Non-Guarantor Subsidiaries [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0	0	0
Consolidations, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	(21,880)	(19,110)	(42,620)	(36,987)
Direct cost and reimbursable expense	0	0	0	0
Intercompany expenses	(21,880)	(19,110)	(42,620)	(36,987)
Depreciation and amortization	0	0	0	0
General and administrative	0	0	0	0
Operating expense	(21,880)	(19,110)	(42,620)	(36,987)
Gain (loss) on disposal of assets	0	0	0	0
Earnings from unconsolidated affiliates, net of losses	(138,158)	(21,076)	(169,908)	(38,815)
Operating income	(138,158)	(21,076)	(169,908)	(38,815)
Interest income	(31,502)	(29,029)	(59,695)	(56,890)
Interest expense	31,502	29,029	59,695	56,890
Gain on sale of unconsolidated affiliate	0		0
Other income (expense), net	0	0	0	0
Income before provision for income taxes	(138,158)	(21,076)	(169,908)	(38,815)
Provision for income taxes	0	0	0	0
Net income	(138,158)	(21,076)	(169,908)	(38,815)
Net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to Bristow Group	(138,158)	(21,076)	(169,908)	(38,815)
Consolidations, Eliminations [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0	0	0
Consolidations, Eliminations [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	$ (21,880)	$ (19,110)	$ (42,620)	$ (36,987)