SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OPERATIONS (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	$ 466,996	$ 472,538
Direct cost and reimbursable expense	362,285	326,471
Intercompany expenses	0	0
Depreciation and amortization	37,146	25,334
General and administrative	61,332	60,432
Operating expense	460,763	412,237
Gain (loss) on disposal of assets	(7,695)	610
Earnings from unconsolidated affiliates, net of losses	6,296	4,281
Operating income	4,834	65,192
Interest expense, net	(7,669)	(7,127)
Other income (expense), net	3,839	(1,239)
Income before provision for income taxes	1,004	56,826
Provision for income taxes	(2,633)	(11,823)
Net income	(1,629)	45,003
Net income attributable to noncontrolling interests	(1,628)	(894)
Net income (loss) attributable to Bristow Group	(3,257)	44,109
Accretion of redeemable noncontrolling interests	(6,301)	0
Net income (loss) attributable to common stockholders	(9,558)	44,109
External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	466,996	472,538
Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	553
Direct cost and reimbursable expense	144	0
Intercompany expenses	0	0
Depreciation and amortization	1,609	(142)
General and administrative	20,551	18,337
Operating expense	22,304	18,195
Gain (loss) on disposal of assets	0	0
Earnings from unconsolidated affiliates, net of losses	(15,434)	36,992
Operating income	(37,738)	19,350
Interest expense, net	27,484	27,518
Other income (expense), net	(316)	(928)
Income before provision for income taxes	(10,570)	45,940
Provision for income taxes	7,327	(1,813)
Net income	(3,243)	44,127
Net income attributable to noncontrolling interests	(14)	(18)
Net income (loss) attributable to Bristow Group	(3,257)	44,109
Accretion of redeemable noncontrolling interests	0
Net income (loss) attributable to common stockholders	(3,257)
Parent Company [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0
Parent Company [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	553
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	89,667	100,463
Direct cost and reimbursable expense	56,734	53,065
Intercompany expenses	0	0
Depreciation and amortization	14,585	10,215
General and administrative	6,831	10,099
Operating expense	78,150	73,379
Gain (loss) on disposal of assets	(7,737)	1,338
Earnings from unconsolidated affiliates, net of losses	0	0
Operating income	3,780	28,422
Interest expense, net	(1,265)	(1,006)
Other income (expense), net	(246)	(72)
Income before provision for income taxes	2,269	27,344
Provision for income taxes	(1,137)	233
Net income	1,132	27,577
Net income attributable to noncontrolling interests	0	0
Net income (loss) attributable to Bristow Group	1,132	27,577
Accretion of redeemable noncontrolling interests	0
Net income (loss) attributable to common stockholders	1,132
Guarantor Subsidiaries [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	64,856	75,637
Guarantor Subsidiaries [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	24,811	24,826
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	402,140	396,901
Direct cost and reimbursable expense	305,407	273,406
Intercompany expenses	24,811	25,379
Depreciation and amortization	20,952	15,261
General and administrative	33,950	31,996
Operating expense	385,120	346,042
Gain (loss) on disposal of assets	42	(728)
Earnings from unconsolidated affiliates, net of losses	6,296	4,281
Operating income	23,358	54,412
Interest expense, net	(33,888)	(33,639)
Other income (expense), net	4,401	(239)
Income before provision for income taxes	(6,129)	20,534
Provision for income taxes	(8,823)	(10,243)
Net income	(14,952)	10,291
Net income attributable to noncontrolling interests	(1,614)	(876)
Net income (loss) attributable to Bristow Group	(16,566)	9,415
Accretion of redeemable noncontrolling interests	(6,301)
Net income (loss) attributable to common stockholders	(22,867)
Non-Guarantor Subsidiaries [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	402,140	396,901
Non-Guarantor Subsidiaries [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0
Consolidations, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	(24,811)	(25,379)
Direct cost and reimbursable expense	0	0
Intercompany expenses	(24,811)	(25,379)
Depreciation and amortization	0	0
General and administrative	0	0
Operating expense	(24,811)	(25,379)
Gain (loss) on disposal of assets	0	0
Earnings from unconsolidated affiliates, net of losses	15,434	(36,992)
Operating income	15,434	(36,992)
Interest expense, net	0	0
Other income (expense), net	0	0
Income before provision for income taxes	15,434	(36,992)
Provision for income taxes	0	0
Net income	15,434	(36,992)
Net income attributable to noncontrolling interests	0	0
Net income (loss) attributable to Bristow Group	15,434	(36,992)
Accretion of redeemable noncontrolling interests	0
Net income (loss) attributable to common stockholders	15,434
Consolidations, Eliminations [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0
Consolidations, Eliminations [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	$ (24,811)	$ (25,379)