ACQUISITIONS (Details)	3 Months Ended								12 Months Ended							12 Months Ended
	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Mar. 31, 2014 Eastern Airways International Limited USD ($)	Mar. 31, 2014 Eastern Airways International Limited GBP (£)	Mar. 31, 2013 Eastern Airways International Limited USD ($)	Feb. 06, 2014 Eastern Airways International Limited USD ($)	Mar. 31, 2014 Bristow Aviation Holdings Limited [Member] USD ($)	Mar. 31, 2013 Bristow Aviation Holdings Limited [Member] USD ($)	Mar. 31, 2012 Bristow Aviation Holdings Limited [Member] USD ($)
Business Acquisition [Line Items]
Ownership percentage in Variable Interest Entity												60.00%	60.00%			49.00%	49.00%
Acquisition cost												$ 44,000,000	£ 27,000,000
Potential earn-out payments	0				34,245,000				0	34,245,000	0	10,000,000	6,000,000
Potential earn-out payment period												three	three
Assets, Current	721,607,000				675,758,000				721,607,000	675,758,000					21,117,000	625,210,000	454,778,000
Total property and equipment, net	2,268,751,000				1,921,072,000				2,268,751,000	1,921,072,000					63,391,000	217,969,000	157,066,000
Goodwill	56,680,000				28,897,000				56,680,000	28,897,000	29,644,000				26,479,000	41,218,000	12,810,000
Other Assets, Noncurrent	88,604,000				52,842,000				88,604,000	52,842,000					20,474,000	45,477,000	26,575,000
Total assets	3,398,257,000				2,950,692,000				3,398,257,000	2,950,692,000					131,461,000	931,288,000	660,321,000
Liabilities, Current	(457,825,000)				(239,825,000)				(457,825,000)	(239,825,000)					(37,644,000)	(1,601,545,000)	(1,351,155,000)
Total long-term debt	(827,095,000)				(764,946,000)				(827,095,000)	(764,946,000)					(20,400,000)	(172,391,000)	(138,147,000)
Other liabilities and deferred credits	(78,126,000)				(57,196,000)				(78,126,000)	(57,196,000)					(8,239,000)	(2,252,000)	(1,755,000)
Total Liabilities															(66,283,000)	(1,898,357,000)	(1,617,704,000)
Temporary Equity	(22,283,000)				0				(22,283,000)	0		(22,283,000)			(21,139,000)	(22,283,000)	0
Assets, Net															44,039,000
Revenues	440,925,000	412,335,000	417,328,000	398,994,000	391,642,000	388,469,000	365,754,000	362,608,000	1,669,582,000	1,508,473,000	1,341,803,000	21,200,000				1,324,483,000	1,161,988,000	1,044,060,000
Temporary Equity, Carrying Amount, Attributable to Noncontrolling Interest [Abstract]
Temporary Equity, Period Start				0					0						21,139,000	0
Temporary Equity, Net Income									700,000			671,000
Temporary Equity, Foreign Currency Translation Adjustments									500,000			473,000
Temporary Equity, Period End	22,283,000				0				22,283,000	0		22,283,000			21,139,000	22,283,000	0
Business Acquisition, Pro Forma Revenue												1,761,390,000		1,625,832,000
Business Acquisition, Pro Forma Net Income (Loss)												$ 188,921,000		$ 144,136,000