VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES (Details)	3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended						6 Months Ended		3 Months Ended	6 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Sep. 30, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	Sep. 30, 2012 Bristow Aviation Holdings Limited [Member] USD ($)	Sep. 30, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	Sep. 30, 2012 Bristow Aviation Holdings Limited [Member] USD ($)	Sep. 30, 2013 Bristow Aviation Holdings Limited [Member] GBP (£)	Mar. 31, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	May 31, 2004 Bristow Aviation Holdings Limited [Member] GBP (£)	Apr. 30, 2004 Bristow Aviation Holdings Limited [Member]	Sep. 30, 2013 Bristow Helicopters Nigeria Ltd [Member]	Sep. 30, 2013 Pan African Airlines Nigeria Ltd [Member]	Sep. 30, 2013 FB Entities [Member] USD ($)	Sep. 30, 2013 FB Entities [Member]
Variable Interest Entities And Other Investments [Line Items]
Number of variable interest entities			3
Ownership percentage in Variable Interest Entity									49.00%						40.00%	50.17%		50.00%
Purchase of deferred stock shares													8,000,000
Business acquisition share price													£ 1
Principal amount of subordinated unsecured loan stock							$ 147,400,000		$ 147,400,000
Interest rate on unsecured loan									13.50%
Deferred interest cost									1,200,000,000
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%
Put Option Guaranteed Rate														10.00%
Cash and cash equivalents	313,521,000	348,349,000	313,521,000	348,349,000	215,623,000	261,550,000	200,534,000		200,534,000			93,227,000
Accounts Receivable, Net, Current	240,876,000		240,876,000		262,781,000		317,060,000		317,060,000			240,861,000
Inventories	158,622,000		158,622,000		153,969,000		104,635,000		104,635,000			100,115,000
Prepaid expenses and other current assets	30,950,000		30,950,000		35,095,000		35,791,000		35,791,000			20,575,000
Assets, Current	770,688,000		770,688,000		675,758,000		658,020,000		658,020,000			454,778,000
Investment in unconsolidated affiliates	272,345,000		272,345,000		272,123,000		1,499,000		1,499,000			9,092,000
Property, Plant and Equipment, Net	2,034,663,000		2,034,663,000		1,921,072,000		161,969,000		161,969,000			157,066,000
Goodwill	29,804,000		29,804,000		28,897,000		13,720,000		13,720,000			12,810,000
Other assets	58,492,000		58,492,000		52,842,000		31,431,000		31,431,000			26,575,000
Total assets	3,165,992,000		3,165,992,000		2,950,692,000		866,639,000		866,639,000			660,321,000
Accounts Payable, Current	70,157,000		70,157,000		69,821,000		210,817,000		210,817,000			128,591,000
Accrued Liabilities, Current	169,751,000		169,751,000		147,681,000		1,279,756,000		1,279,756,000			1,214,209,000
Current deferred taxes	2,394,000		2,394,000		0		6,605,000		6,605,000			7,907,000
Long-term Debt, Current Maturities	6,989,000		6,989,000		22,323,000		70,000		70,000			448,000
Liabilities, Current	249,291,000		249,291,000		239,825,000		1,497,248,000		1,497,248,000			1,351,155,000
Total long-term debt	824,094,000		824,094,000		764,946,000		138,147,000		138,147,000			138,147,000
Accrued pension liabilities	127,296,000		127,296,000		126,647,000		127,296,000		127,296,000			126,647,000
Other liabilities and deferred credits	49,529,000		49,529,000		57,196,000		1,099,000		1,099,000			1,755,000
Liabilities							1,763,790,000		1,763,790,000			1,617,704,000
Revenues	417,328,000	365,754,000	816,322,000	728,362,000			330,006,000	278,956,000	641,807,000	563,736,000
Operating Income (Loss)							18,536,000	4,512,000	27,667,000	8,391,000
Net income	109,884,000	30,434,000	136,796,000	54,630,000			81,236,000	(35,249,000)	48,886,000	(70,742,000)
Proceeds from Divestiture of Interest in Joint Venture																	112,200,000
Gain on sale of equity method investment	$ 103,924,000	$ 0	$ 103,924,000	$ 0													$ 103,900,000
Number of aicraft																		64