SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OPERATIONS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Total consolidated gross revenue	$ 337,443	$ 419,887	$ 1,064,308	$ 1,333,794
Operating expense:
Direct cost and reimbursable expense	272,549	311,515	869,612	1,002,620
Intercompany expenses	0	0	0	0
Depreciation and amortization	29,768	32,320	93,054	106,853
General and administrative	45,409	59,513	149,278	174,302
Operating expense	347,726	403,348	1,111,944	1,283,775
Loss on impairment	(8,706)	0	(16,278)	(27,713)
Gain (loss) on disposal of assets	(874)	(2,154)	(13,077)	(23,856)
Earnings from unconsolidated affiliates, net of losses	766	7,692	4,777	(1,372)
Operating income (loss)	(19,097)	22,077	(72,214)	(2,922)
Interest expense, net	(12,179)	(9,536)	(34,533)	(24,384)
Other income (expense), net	1,668	650	(1,518)	(6,935)
Income (loss) before benefit (provision) for income taxes	(29,608)	13,191	(108,265)	(34,241)
Allocation of consolidated income taxes	3,560	(9,623)	11,038	(9,500)
Net income (loss)	(26,048)	3,568	(97,227)	(43,741)
Net (income) loss attributable to noncontrolling interests	4,121	(366)	4,731	(3,446)
Net income (loss) attributable to Bristow Group	(21,927)	3,202	(92,496)	(47,187)
Accretion of redeemable noncontrolling interests	0	0	0	(1,498)
Net income (loss) attributable to common stockholders	(21,927)	3,202	(92,496)	(48,685)
External Customer
Revenue:
Total consolidated gross revenue	337,443	419,887	1,064,308	1,333,794
Intercompany Customer
Revenue:
Total consolidated gross revenue	0	0	0	0
Consolidations, Eliminations
Revenue:
Total consolidated gross revenue	(29,799)	(23,560)	(78,413)	(70,295)
Operating expense:
Direct cost and reimbursable expense	0	0	0	0
Intercompany expenses	(29,799)	(23,560)	(78,413)	(70,295)
Depreciation and amortization	0	0	0	0
General and administrative	0	0	0	0
Operating expense	(29,799)	(23,560)	(78,413)	(70,295)
Loss on impairment	0		0	0
Gain (loss) on disposal of assets	0	0	0	0
Earnings from unconsolidated affiliates, net of losses	(4,561)	796	17,905	90,223
Operating income (loss)	(4,561)	796	17,905	90,223
Interest expense, net	0	0	0	0
Other income (expense), net	0	0	0	0
Income (loss) before benefit (provision) for income taxes	(4,561)	796	17,905	90,223
Allocation of consolidated income taxes	0	0	0	0
Net income (loss)	(4,561)	796	17,905	90,223
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Net income (loss) attributable to Bristow Group	(4,561)	796	17,905	90,223
Accretion of redeemable noncontrolling interests				0
Net income (loss) attributable to common stockholders				90,223
Consolidations, Eliminations | External Customer
Revenue:
Total consolidated gross revenue	0	0	0	0
Consolidations, Eliminations | Intercompany Customer
Revenue:
Total consolidated gross revenue	(29,799)	(23,560)	(78,413)	(70,295)
Parent Company
Revenue:
Total consolidated gross revenue	0	0	0	0
Operating expense:
Direct cost and reimbursable expense	703	1,146	72	229
Intercompany expenses	0	0	0	0
Depreciation and amortization	2,233	1,852	6,549	5,136
General and administrative	13,897	22,175	51,643	62,490
Operating expense	16,833	25,173	58,264	67,855
Loss on impairment	0		0	0
Gain (loss) on disposal of assets	0	0	0	0
Earnings from unconsolidated affiliates, net of losses	4,562	(753)	(17,861)	(90,180)
Operating income (loss)	(12,271)	(25,926)	(76,125)	(158,035)
Interest expense, net	(11,525)	30,442	(31,757)	88,893
Other income (expense), net	497	230	1,249	185
Income (loss) before benefit (provision) for income taxes	(23,299)	4,746	(106,633)	(68,957)
Allocation of consolidated income taxes	1,386	(1,530)	14,178	21,812
Net income (loss)	(21,913)	3,216	(92,455)	(47,145)
Net (income) loss attributable to noncontrolling interests	(13)	(14)	(40)	(42)
Net income (loss) attributable to Bristow Group	(21,926)	3,202	(92,495)	(47,187)
Accretion of redeemable noncontrolling interests				0
Net income (loss) attributable to common stockholders				(47,187)
Parent Company | External Customer
Revenue:
Total consolidated gross revenue	0	0	0	0
Parent Company | Intercompany Customer
Revenue:
Total consolidated gross revenue	0	0	0	0
Guarantor Subsidiaries
Revenue:
Total consolidated gross revenue	69,357	79,550	205,827	249,711
Operating expense:
Direct cost and reimbursable expense	45,794	44,053	142,270	149,010
Intercompany expenses	0	0	0	0
Depreciation and amortization	10,942	15,621	38,728	47,736
General and administrative	5,841	5,960	18,921	18,752
Operating expense	62,577	65,634	199,919	215,498
Loss on impairment	0		(4,761)	(2,508)
Gain (loss) on disposal of assets	(361)	(100)	(11,936)	(19,738)
Earnings from unconsolidated affiliates, net of losses	0	0	0	0
Operating income (loss)	6,419	13,816	(10,789)	11,967
Interest expense, net	(42)	(1,035)	(1,070)	(3,381)
Other income (expense), net	1,666	252	3,312	336
Income (loss) before benefit (provision) for income taxes	8,043	13,033	(8,547)	8,922
Allocation of consolidated income taxes	(1,138)	(309)	(4,870)	(2,719)
Net income (loss)	6,905	12,724	(13,417)	6,203
Net (income) loss attributable to noncontrolling interests	0	0	0	0
Net income (loss) attributable to Bristow Group	6,905	12,724	(13,417)	6,203
Accretion of redeemable noncontrolling interests				0
Net income (loss) attributable to common stockholders				6,203
Guarantor Subsidiaries | External Customer
Revenue:
Total consolidated gross revenue	39,558	55,990	127,414	179,416
Guarantor Subsidiaries | Intercompany Customer
Revenue:
Total consolidated gross revenue	29,799	23,560	78,413	70,295
Non-Guarantor Subsidiaries
Revenue:
Total consolidated gross revenue	297,885	363,897	936,894	1,154,378
Operating expense:
Direct cost and reimbursable expense	226,052	266,316	727,270	853,381
Intercompany expenses	29,799	23,560	78,413	70,295
Depreciation and amortization	16,593	14,847	47,777	53,981
General and administrative	25,671	31,378	78,714	93,060
Operating expense	298,115	336,101	932,174	1,070,717
Loss on impairment	(8,706)		(11,517)	(25,205)
Gain (loss) on disposal of assets	(513)	(2,054)	(1,141)	(4,118)
Earnings from unconsolidated affiliates, net of losses	765	7,649	4,733	(1,415)
Operating income (loss)	(8,684)	33,391	(3,205)	52,923
Interest expense, net	(612)	(38,943)	(1,706)	(109,896)
Other income (expense), net	(495)	168	(6,079)	(7,456)
Income (loss) before benefit (provision) for income taxes	(9,791)	(5,384)	(10,990)	(64,429)
Allocation of consolidated income taxes	3,312	(7,784)	1,730	(28,593)
Net income (loss)	(6,479)	(13,168)	(9,260)	(93,022)
Net (income) loss attributable to noncontrolling interests	4,134	(352)	4,771	(3,404)
Net income (loss) attributable to Bristow Group	(2,345)	(13,520)	(4,489)	(96,426)
Accretion of redeemable noncontrolling interests				(1,498)
Net income (loss) attributable to common stockholders				(97,924)
Non-Guarantor Subsidiaries | External Customer
Revenue:
Total consolidated gross revenue	297,885	363,897	936,894	1,154,378
Non-Guarantor Subsidiaries | Intercompany Customer
Revenue:
Total consolidated gross revenue	$ 0	$ 0	$ 0	$ 0