SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION OCI (Details) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (77,149,000)	$ 88,707,000	$ 187,779,000
Currency translation adjustments	(21,604,000)	(71,617,000)	18,729,000
Pension liability adjustment	705,000	(36,978,000)	23,367,000
Total comprehensive income (loss)	(98,048,000)	(19,888,000)	229,875,000
Net (income) loss attributable to noncontrolling interests	4,707,000	(4,407,000)	(1,042,000)
Currency translation adjustment attributable to noncontrolling interest	1,409,000	(5,228,000)	1,081,000
Total comprehensive (income) loss attributable to noncontrolling interests	6,116,000	(9,635,000)	39,000
Total comprehensive income (loss) attributable to Bristow Group	(91,932,000)	(29,523,000)	229,914,000
Accretion of redeemable noncontrolling interests	(1,498,000)	0	0
Total comprehensive income (loss) attributable to common stockholders	(93,430,000)	(29,523,000)	229,914,000
Parent Company Only
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(72,385,000)	84,359,000	186,797,000
Currency translation adjustments	2,000	(25,885,000)	8,173,000
Pension liability adjustment	0	0	0
Total comprehensive income (loss)	(72,383,000)	58,474,000	194,970,000
Net (income) loss attributable to noncontrolling interests	(57,000)	(59,000)	(60,000)
Currency translation adjustment attributable to noncontrolling interest	0	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	(57,000)	(59,000)	(60,000)
Total comprehensive income (loss) attributable to Bristow Group	(72,440,000)	58,415,000	194,910,000
Accretion of redeemable noncontrolling interests	0
Total comprehensive income (loss) attributable to common stockholders	(72,440,000)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	1,171,000	88,287,000	71,509,000
Currency translation adjustments	0	0	0
Pension liability adjustment	0	0	0
Total comprehensive income (loss)	1,171,000	88,287,000	71,509,000
Net (income) loss attributable to noncontrolling interests	0	0	0
Currency translation adjustment attributable to noncontrolling interest	0	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Total comprehensive income (loss) attributable to Bristow Group	1,171,000	88,287,000	71,509,000
Accretion of redeemable noncontrolling interests	0
Total comprehensive income (loss) attributable to common stockholders	1,171,000
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(4,705,000)	(39,252,000)	118,639,000
Currency translation adjustments	(186,812,000)	24,852,000	(40,402,000)
Pension liability adjustment	705,000	(36,978,000)	23,367,000
Total comprehensive income (loss)	(190,812,000)	(51,378,000)	101,604,000
Net (income) loss attributable to noncontrolling interests	4,764,000	(4,348,000)	(982,000)
Currency translation adjustment attributable to noncontrolling interest	1,409,000	(5,228,000)	1,081,000
Total comprehensive (income) loss attributable to noncontrolling interests	6,173,000	(9,576,000)	99,000
Total comprehensive income (loss) attributable to Bristow Group	(184,639,000)	(60,954,000)	101,703,000
Accretion of redeemable noncontrolling interests	(1,498,000)
Total comprehensive income (loss) attributable to common stockholders	(186,137,000)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(1,230,000)	(44,687,000)	(189,166,000)
Currency translation adjustments	165,206,000	(70,584,000)	50,958,000
Pension liability adjustment	0	0	0
Total comprehensive income (loss)	163,976,000	(115,271,000)	(138,208,000)
Net (income) loss attributable to noncontrolling interests	0	0	0
Currency translation adjustment attributable to noncontrolling interest	0	0	0
Total comprehensive (income) loss attributable to noncontrolling interests	0	0	0
Total comprehensive income (loss) attributable to Bristow Group	163,976,000	$ (115,271,000)	$ (138,208,000)
Accretion of redeemable noncontrolling interests	0
Total comprehensive income (loss) attributable to common stockholders	$ 163,976,000