SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OPERATIONS (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	$ 352,109	$ 369,398
Direct cost and reimbursable expense	297,777	302,157
Intercompany expenses	0	0
Depreciation and amortization	31,056	34,694
General and administrative	46,707	52,595
Operating expense	375,540	389,446
Loss on impairment	(1,192)	0
Gain (loss) on disposal of assets	699	(10,017)
Earnings from unconsolidated affiliates, net of losses	(665)	3,830
Operating income (loss)	(24,589)	(26,235)
Interest expense, net	(16,021)	(10,886)
Other income (expense), net	(1,645)	(6,189)
Income (loss) before provision for income taxes	(42,255)	(43,310)
Benefit (provision) for income taxes	(13,491)	2,238
Net income (loss)	(55,746)	(41,072)
Net (income) loss attributable to noncontrolling interests	471	300
Net loss attributable to Bristow Group	(55,275)	(40,772)
External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	352,109	369,398
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	(32,191)	(24,291)
Direct cost and reimbursable expense	0	0
Intercompany expenses	(32,191)	(24,291)
Depreciation and amortization	0	0
General and administrative	0	0
Operating expense	(32,191)	(24,291)
Loss on impairment	0
Gain (loss) on disposal of assets	0	0
Earnings from unconsolidated affiliates, net of losses	20,645	12,776
Operating income (loss)	20,645	12,776
Interest expense, net	0	0
Other income (expense), net	0	0
Income (loss) before provision for income taxes	20,645	12,776
Benefit (provision) for income taxes	0	0
Net income (loss)	20,645	12,776
Net (income) loss attributable to noncontrolling interests	0	0
Net loss attributable to Bristow Group	20,645	12,776
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	(32,191)	(24,291)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	0	0
Direct cost and reimbursable expense	6	(257)
Intercompany expenses	0	0
Depreciation and amortization	2,917	2,093
General and administrative	19,107	20,259
Operating expense	22,030	22,095
Loss on impairment	0
Gain (loss) on disposal of assets	0	0
Earnings from unconsolidated affiliates, net of losses	(20,645)	(12,776)
Operating income (loss)	(42,675)	(34,871)
Interest expense, net	(9,058)	(9,885)
Other income (expense), net	(29)	546
Income (loss) before provision for income taxes	(51,762)	(44,210)
Benefit (provision) for income taxes	(3,502)	3,453
Net income (loss)	(55,264)	(40,757)
Net (income) loss attributable to noncontrolling interests	(11)	(15)
Net loss attributable to Bristow Group	(55,275)	(40,772)
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	0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	77,966	69,604
Direct cost and reimbursable expense	52,334	48,618
Intercompany expenses	0	0
Depreciation and amortization	12,483	16,981
General and administrative	5,762	6,590
Operating expense	70,579	72,189
Loss on impairment	(1,192)
Gain (loss) on disposal of assets	416	(10,227)
Earnings from unconsolidated affiliates, net of losses	0	0
Operating income (loss)	6,611	(12,812)
Interest expense, net	(5,780)	(657)
Other income (expense), net	(357)	1,235
Income (loss) before provision for income taxes	474	(12,234)
Benefit (provision) for income taxes	(4,160)	(2,222)
Net income (loss)	(3,686)	(14,456)
Net (income) loss attributable to noncontrolling interests	0	0
Net loss attributable to Bristow Group	(3,686)	(14,456)
Guarantor Subsidiaries [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	45,775	45,313
Guarantor Subsidiaries [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	32,191	24,291
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	306,334	324,085
Direct cost and reimbursable expense	245,437	253,796
Intercompany expenses	32,191	24,291
Depreciation and amortization	15,656	15,620
General and administrative	21,838	25,746
Operating expense	315,122	319,453
Loss on impairment	0
Gain (loss) on disposal of assets	283	210
Earnings from unconsolidated affiliates, net of losses	(665)	3,830
Operating income (loss)	(9,170)	8,672
Interest expense, net	(1,183)	(344)
Other income (expense), net	(1,259)	(7,970)
Income (loss) before provision for income taxes	(11,612)	358
Benefit (provision) for income taxes	(5,829)	1,007
Net income (loss)	(17,441)	1,365
Net (income) loss attributable to noncontrolling interests	482	315
Net loss attributable to Bristow Group	(16,959)	1,680
Non-Guarantor Subsidiaries [Member] | External Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	306,334	324,085
Non-Guarantor Subsidiaries [Member] | Intercompany Customer [Member]
Condensed Financial Statements, Captions [Line Items]
Total consolidated gross revenue	$ 0	$ 0