VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES (Details)	3 Months Ended		9 Months Ended				9 Months Ended			3 Months Ended		9 Months Ended							9 Months Ended			9 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2014 Unrelated Local Nigerian Partners [Member]	Dec. 31, 2014 Nigerian Company owned by 100% Nigerian Employees [Member]	Dec. 31, 2014 Employee Trust Fund [Member]	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] USD ($)	Dec. 31, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] USD ($)	Dec. 31, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] GBP (£)	Mar. 31, 2014 Bristow Aviation Holdings Limited [Member] USD ($)	May 31, 2004 Bristow Aviation Holdings Limited [Member] USD ($)	May 31, 2004 Bristow Aviation Holdings Limited [Member] GBP (£)	Apr. 30, 2004 Bristow Aviation Holdings Limited [Member]	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] Caledonia Investments Plc [Member] People voting_rights	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] Director One [Member] voting_rights	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] Director Two [Member] voting_rights	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] Caledonia Investments Plc [Member]	Dec. 31, 2014 Bristow Aviation Holdings Limited [Member] European Union [Member]	Dec. 31, 2014 Bristow Helicopters Nigeria Ltd [Member]	Jul. 31, 2014 Nigerian Company owned by 100% Nigerian Employees [Member]	Dec. 31, 2013 Nigerian Company owned by 100% Nigerian Employees [Member]	Dec. 31, 2014 Pan African Airlines Nigeria Ltd [Member]	Dec. 31, 2014 HCA [Member] USD ($)	Dec. 31, 2014 HCA [Member] USD ($)	Dec. 31, 2014 HCA [Member] GBP (£)	Mar. 31, 2014 HCA [Member]	Dec. 31, 2014 Lider Taxi Aereo S.A. [Member]	Mar. 31, 2014 Lider Taxi Aereo S.A. [Member]
Variable Interest Entities And Other Investments [Line Items]
Number of variable interest entities			4
Ownership percentage in Variable Interest Entity												49.00%												40.00%			50.17%
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage, Third Party							10.00%	48.00%	2.00%			51.00%										46.00%	5.00%
Purchase of deferred stock shares																8,000,000	8,000,000
Business acquisition share price																	£ 1
Total Amount Paid For Deferred Shares																$ 14,400,000
Principal amount of subordinated unsecured loan stock										141,900,000		141,900,000		91,000,000
Interest rate on unsecured loan												13.50%
Deferred interest cost												1,400,000,000
Number Of Voting Rights																			3	1	1
Number of Board Of Directors Nominations																			2
Call option price held by noncontrolling interest														1,000,000
Call Option Rate Over LIBOR										3.00%		3.00%
Call Option Guaranteed Rate																12.00%	12.00%
Put Option Guaranteed Rate																		10.00%
Equity Method Investment, Ownership Percentage																															50.00%	41.90%	42.50%
Variable Interest Entity, Qualitative or Quantitative Information, Purchased Percentage From Third Party																									29.00%	19.00%
Proceeds from sale of unconsolidated affiliate			4,185,000	112,210,000																									4,185,000	2,700,000
Gain on sale of unconsolidated affiliates	3,921,000	0	3,921,000	103,924,000																								3,921,000	3,921,000
Statement of Financial Position [Abstract]
Cash and cash equivalents	121,366,000	323,230,000	121,366,000	323,230,000	204,341,000	215,623,000				105,290,000		105,290,000			173,490,000
Accounts Receivable, Net, Current	295,571,000		295,571,000		297,443,000					447,351,000		447,351,000			311,641,000
Inventories	139,027,000		139,027,000		137,463,000					93,352,000		93,352,000			94,288,000
Prepaid expenses and other current assets	50,140,000		50,140,000		53,084,000					51,988,000		51,988,000			45,791,000
Total current assets	631,941,000		631,941,000		721,607,000					697,981,000		697,981,000			625,210,000
Investment in unconsolidated affiliates	257,073,000		257,073,000		262,615,000					344,000		344,000			1,414,000
Property, Plant and Equipment, Net	2,129,388,000		2,129,388,000		2,268,751,000					223,889,000		223,889,000			217,969,000
Goodwill	53,828,000		53,828,000		56,680,000					38,492,000		38,492,000			41,218,000
Other assets	107,512,000		107,512,000		88,604,000					61,705,000		61,705,000			45,477,000
Total assets	3,179,742,000		3,179,742,000		3,398,257,000					1,022,411,000		1,022,411,000			931,288,000
Accounts payable	90,047,000		90,047,000		89,818,000					330,967,000		330,967,000			182,892,000
Accrued Liabilities	200,343,000		200,343,000		204,498,000					129,757,000		129,757,000			113,820,000
Accrued interest	5,530,000		5,530,000		16,157,000					1,436,382,000		1,436,382,000			1,291,581,000
Current deferred taxes	12,670,000		12,670,000		12,372,000					3,657,000		3,657,000			3,588,000
Current Maturities of long-term debt	14,277,000		14,277,000		14,207,000					6,326,000		6,326,000			9,664,000
Total current liabilities	373,008,000		373,008,000		457,825,000					1,907,089,000		1,907,089,000			1,601,545,000
Total long-term debt	803,911,000		803,911,000		827,095,000					157,407,000		157,407,000			172,391,000
Accrued pension liabilities	62,110,000		62,110,000		86,823,000					62,110,000		62,110,000			86,824,000
Other liabilities and deferred credits	59,953,000		59,953,000		78,126,000					7,080,000		7,080,000			2,252,000
Deferred taxes	162,895,000		162,895,000		169,519,000					1,156,000		1,156,000			13,062,000
Temporary equity	23,660,000		23,660,000		22,283,000					23,660,000		23,660,000			22,283,000
Liabilities										2,158,502,000		2,158,502,000			1,898,357,000
Revenue	460,140,000	412,335,000	1,408,314,000	1,228,657,000						371,974,000	328,231,000	1,147,406,000	970,038,000
Operating Income (Loss)										(13,633,000)	12,782,000	10,085,000	40,449,000
Net income (loss)	$ 71,000	$ 19,014,000	$ 72,899,000	$ 155,810,000						$ (58,582,000)	$ (37,179,000)	$ (143,930,000)	$ 11,707,000