TAXES (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2016 USD ($) aircraft	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Nov. 01, 2015	Jan. 29, 2015	Feb. 06, 2014
Components of Deferred Tax Assets and Liabilities [Line Items]
Goodwill, Impairment Loss	$ 41,579	$ 0
Foreign tax credit carryback, maximum, period	1 year
Foreign tax credit carryforward, maximum, period	10 years
Deferred tax assets, valuation allowance	$ 29,373	11,700
Increase (decrease) in valuation allowance	17,700
Effective Income Tax Rate Reconciliation, Foreign Tax Change In Lieu Of Foreign Tax Credits	$ 2,100
UK corporate tax rate benefit			$ 2,900
Number of aircraft involved in intercompany leasing transaction | aircraft	11
Remaining useful life of an intercompany leasing transaction	13 years
Tax benefit from intercompany leasing transaction	$ 2,800	2,900	2,900
Unrecognized tax benefits period increase decrease	400	500	(1,500)
Interest and penalties	300	400	100
Unremitted foreign earnings reinvested abroad	832,100	805,300
Tax benefit attributable to options exercised	0	1,600	5,700
Income taxes paid	28,000	34,800	59,100
Deferred tax assets:
Deferred tax assets - foreign tax credits	41,140	31,134
Deferred tax assets, net operating loss	28,695	17,487
Deferred tax assets - accrued pension liability	13,266	21,657
Deferred tax assets - accrued equity compensation	17,092	12,728
Deferred tax assets - deferred revenues	1,749	2,156
Deferred tax assets - employee award programs	5,098	7,515
Deferred tax assets - employee payroll accruals	5,099	5,118
Deferred tax assets, inventories	3,305	5,259
Deferred tax assets, investment in unconsolidated affiliates	10,863	6,539
Deferred tax assets - other	4,903	4,790
Deferred tax assets, valuation allowance	(29,373)	(11,700)
Total deferred tax assets	101,837	102,683
Deferred tax liabilities:
Deferred tax liabilities- property and equipment	(202,388)	(207,395)
Deferred tax liabilities- inventories	(799)	(196)
Deferred tax liabilities- investments in unconsolidated affiliates	(38)	0
Deferred tax liabilities - employee programs	(1,360)	(1,564)
Deferred tax liabilities- other	(3,390)	(8,378)
Total deferred tax liabilities	(207,975)	(217,533)
Net deferred tax liabilities	(106,138)	(114,850)
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Domestic	(115,277)	(40,602)	(14,357)
Foreign	36,046	152,075	259,348
Income (loss) before provision for income taxes	(79,231)	111,473	244,991
Effective income tax rate reconciliation, amount
Current domestic provision for income taxes	(29,907)	4	36,872
Current foreign provision for income taxes	27,317	34,822	33,939
Current provision for income taxes total	(2,590)	34,826	70,811
Deferred domestic provision for income taxes	(4,483)	(11,358)	(6,646)
Deferred foreign provision for income taxes	4,991	(702)	(6,953)
Deferred Income Tax Expense (Benefit), Total	508	(12,060)	(13,599)
Income Tax Expense (Benefit)	$ (2,082)	$ 22,766	$ 57,212
Effective income tax rate reconciliation, tax contingency, percent
Statutory rate	35.00%	35.00%	35.00%
Net foreign taxes on non-U.S. earnings	(8.40%)	26.30%	11.80%
Benefit of foreign tax deductions in the U.S.	2.60%	0.00%	0.00%
Foreign earnings indefinitely reinvested abroad	15.90%	(47.00%)	(18.90%)
Change in valuation allowance	(25.30%)	4.00%	1.80%
Foreign earnings that are currently taxed in the U.S.	(7.90%)	8.70%	4.10%
Effect of reduction in U.K. corporate income tax rate	1.10%	0.00%	(1.20%)
Dividend inclusion as a result of internal realignment	0.00%	0.00%	1.10%
Goodwill impairment	(11.80%)	0.00%	0.00%
Benefit of current year foreign tax credits	0.00%	(11.30%)	(5.20%)
Tax reserve release	0.20%	(0.10%)	(0.70%)
Other, net	1.20%	4.80%	(4.40%)
Effective Tax Rate Total	2.60%	20.40%	23.40%
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits- beginning balance	$ 4,904	$ 4,380
Pre-acquisition tax liability	(4,193)	0
Increase for tax positions taken in prior years	898	591
Decreases for tax positions taken in prior years	(188)	0
Decrease related to settlements with authorities	(328)	(67)
Unrecognized tax benefits- ending balance	$ 1,093	$ 4,904	$ 4,380
United States
Components of Deferred Tax Assets and Liabilities [Line Items]
Open tax years by jurisdiction	2013
U.K.
Components of Deferred Tax Assets and Liabilities [Line Items]
Open tax years by jurisdiction	2014
Nigeria
Components of Deferred Tax Assets and Liabilities [Line Items]
Open tax years by jurisdiction	2009
Trinidad
Components of Deferred Tax Assets and Liabilities [Line Items]
Open tax years by jurisdiction	2005
Australia
Components of Deferred Tax Assets and Liabilities [Line Items]
Open tax years by jurisdiction	2012
Year 2021
Deferred tax assets:
Deferred tax assets - foreign tax credits	$ 6,600
Year 2022
Deferred tax assets:
Deferred tax assets - foreign tax credits	3,900
Year 2023
Deferred tax assets:
Deferred tax assets - foreign tax credits	200
Year 2024
Deferred tax assets:
Deferred tax assets - foreign tax credits	15,600
Year 2025
Deferred tax assets:
Deferred tax assets - foreign tax credits	14,800
Valuation Allowance of Deferred Tax Assets
Components of Deferred Tax Assets and Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(20,100)
Valuation Allowance Of Deferred Tax Assets Rate Reduction
Components of Deferred Tax Assets and Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	900
Domestic tax authority
Components of Deferred Tax Assets and Liabilities [Line Items]
Net operating loss	127,500
Eastern Airways
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Business acquisition, percentage of voting interests acquired						60.00%
Pre-acquisition tax liability			$ (4,193)
Airnorth
Components of Deferred Tax Assets and Liabilities [Line Items]
Additional paid-in capital changes, tax portion	$ 2,400
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Business acquisition, percentage of voting interests acquired				15.00%	85.00%