SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION IS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Gross revenue	$ 398,994	$ 362,608
Intercompany revenue	0	0
Total consolidated gross revenue	398,994	362,608
Direct cost and reimbursable expense	291,999	262,940
Intercompany expenses	0	0
Depreciation and amortization	22,819	21,372
General and administrative	40,308	34,977
Operating expense	355,126	319,289
Gain (loss) on disposal of assets	(1,721)	(5,315)
Earnings from unconsolidated affiliates, net of losses	13,972	1,989
Operating income	56,119	39,993
Interest income	119	88
Interest expense	(20,370)	(8,774)
Other income (expense), net	(1,366)	(931)
Income before provision for income taxes	34,502	30,376
Provision for income taxes	(7,590)	(6,180)
Net income	26,912	24,196
Net income attributable to noncontrolling interests	(26)	(534)
Net income attributable to Bristow Group	26,886	23,662
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Gross revenue	0	0
Intercompany revenue	374	578
Total consolidated gross revenue	374	578
Direct cost and reimbursable expense	0	0
Intercompany expenses	0	0
Depreciation and amortization	717	1,069
General and administrative	11,790	8,929
Operating expense	12,507	9,998
Gain (loss) on disposal of assets	0	0
Earnings from unconsolidated affiliates, net of losses	31,750	17,739
Operating income	19,617	8,319
Interest income	28,196	27,940
Interest expense	(20,595)	(8,850)
Other income (expense), net	2	51
Income before provision for income taxes	27,220	27,460
Provision for income taxes	(317)	(3,779)
Net income	26,903	23,681
Net income attributable to noncontrolling interests	(17)	(19)
Net income attributable to Bristow Group	26,886	23,662
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Gross revenue	76,643	69,512
Intercompany revenue	20,366	17,299
Total consolidated gross revenue	97,009	86,811
Direct cost and reimbursable expense	57,444	49,772
Intercompany expenses	0	0
Depreciation and amortization	10,683	8,075
General and administrative	7,585	6,851
Operating expense	75,712	64,698
Gain (loss) on disposal of assets	1,388	(1,419)
Earnings from unconsolidated affiliates, net of losses	0	0
Operating income	22,685	20,694
Interest income	0	9
Interest expense	(31)	0
Other income (expense), net	14	57
Income before provision for income taxes	22,668	20,760
Provision for income taxes	(525)	(1,758)
Net income	22,143	19,002
Net income attributable to noncontrolling interests	0	0
Net income attributable to Bristow Group	22,143	19,002
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Gross revenue	322,351	293,096
Intercompany revenue	0	0
Total consolidated gross revenue	322,351	293,096
Direct cost and reimbursable expense	234,555	213,168
Intercompany expenses	20,740	17,877
Depreciation and amortization	11,419	12,228
General and administrative	20,933	19,197
Operating expense	287,647	262,470
Gain (loss) on disposal of assets	(3,109)	(3,896)
Earnings from unconsolidated affiliates, net of losses	13,972	1,989
Operating income	45,567	28,719
Interest income	116	0
Interest expense	(27,937)	(27,785)
Other income (expense), net	(1,382)	(1,039)
Income before provision for income taxes	16,364	(105)
Provision for income taxes	(6,748)	(643)
Net income	9,616	(748)
Net income attributable to noncontrolling interests	(9)	(515)
Net income attributable to Bristow Group	9,607	(1,263)
Consolidations, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Gross revenue	0	0
Intercompany revenue	(20,740)	(17,877)
Total consolidated gross revenue	(20,740)	(17,877)
Direct cost and reimbursable expense	0	0
Intercompany expenses	(20,740)	(17,877)
Depreciation and amortization	0	0
General and administrative	0	0
Operating expense	(20,740)	(17,877)
Gain (loss) on disposal of assets	0	0
Earnings from unconsolidated affiliates, net of losses	(31,750)	(17,739)
Operating income	(31,750)	(17,739)
Interest income	(28,193)	(27,861)
Interest expense	28,193	27,861
Other income (expense), net	0	0
Income before provision for income taxes	(31,750)	(17,739)
Provision for income taxes	0	0
Net income	(31,750)	(17,739)
Net income attributable to noncontrolling interests	0	0
Net income attributable to Bristow Group	$ (31,750)	$ (17,739)