VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES (Details)	3 Months Ended				3 Months Ended						3 Months Ended				3 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Jun. 30, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	Jun. 30, 2012 Bristow Aviation Holdings Limited [Member] USD ($)	Jun. 30, 2013 Bristow Aviation Holdings Limited [Member] GBP (£)	Mar. 31, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	May 31, 2004 Bristow Aviation Holdings Limited [Member] USD ($)	Apr. 30, 2004 Bristow Aviation Holdings Limited [Member]	Jun. 30, 2013 Bristow Helicopters Nigeria Ltd [Member]	Jun. 30, 2013 Pan African Airlines Nigeria Ltd [Member]	Jun. 30, 2013 FB Entities [Member]	Jun. 30, 2013 FB Entities [Member] Aircraft Owned [Member]	Sep. 30, 2013 FB Entities [Member] Subsequent Event [Member] USD ($)
Variable Interest Entities And Other Investments [Line Items]
Document Period End Date	Jun. 30, 2013
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
Purchase of deferred stock value									$ 14,400,000
Principal amount of subordinated unsecured loan stock					138,000,000
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 Guaranteed Rate					3.00%				12.00%
Put Option Guaranteed Rate										10.00%
Cash and cash equivalents	159,992,000	227,250,000	215,623,000	261,550,000	74,913,000			93,227,000
Accounts Receivable, Net, Current	268,656,000		262,781,000		227,502,000			240,861,000
Inventories	157,946,000		153,969,000		103,391,000			100,115,000
Prepaid expenses and other current assets	32,266,000		35,095,000		17,968,000			20,575,000
Assets, Current	632,487,000		675,758,000		423,774,000			454,778,000
Investment in unconsolidated affiliates	276,997,000		272,123,000		8,493,000			9,092,000
Property, Plant and Equipment, Net	2,063,290,000		1,921,072,000		154,278,000			157,066,000
Goodwill	28,845,000		28,897,000		12,796,000			12,810,000
Other assets	56,868,000		52,842,000		30,179,000			26,575,000
Total assets	3,058,487,000		2,950,692,000		629,520,000			660,321,000
Accounts Payable, Current	73,138,000		69,821,000		111,575,000			128,591,000
Accrued Liabilities, Current	128,824,000		147,681,000		1,244,497,000			1,214,209,000
Current deferred taxes	3,911,000		0		6,761,000			7,907,000
Long-term Debt, Current Maturities	6,950,000		22,323,000		1,184,000			448,000
Liabilities, Current	212,823,000		239,825,000		1,364,017,000			1,351,155,000
Total long-term debt	882,823,000		764,946,000		138,147,000			138,147,000
Accrued pension liabilities	121,476,000		126,647,000		121,476,000			126,647,000
Other liabilities and deferred credits	53,532,000		57,196,000		1,354,000			1,755,000
Liabilities					1,624,994,000			1,617,704,000
Revenues	398,994,000	362,608,000			311,801,000	284,780,000
Operating Income (Loss)					9,131,000	3,879,000
Net income	26,912,000	24,196,000			32,350,000	35,493,000
Proceeds from Divestiture of Interest in Joint Venture															112,000,000
Gain On Sale Of Joint Ventures															$ 104,000,000
Number Of Aicraft Owned														64