COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended		12 Months Ended
	Jun. 30, 2012 number	Jun. 30, 2011	Mar. 31, 2012
Aircraft Purchase Contracts [Line Items]
Aircraft Purchase Commitments - Total	$ 307,343,000
Aircraft Purchase Options - Total	813,137,000
Number of aircraft purchase commitments - Large	17
Number of aircraft purchase commitments - Total	17
Number of aircraft purchase options - Medium	12
Number of aircraft purchase options - Large	24
Number of aircraft purchase options - Total	36
Number of signed client contracts	5
Number of contingent aircraft orders	6
Number of aircraft purchased not on order	1
Sale Leaseback Transaction [Line Items]
Number of aircraft sale leaseback			7
Sale price of the aircraft leaseback			147,800,000
Lease term of the aircraft	The aircraft leases entered into in fiscal year 2012 range from base terms of 60 to 72 months with renewal options of up to 72 months in some cases, include purchase options upon expiration and some include early purchase options.
Monthly Rent payment	2,560,000
Number of leased aircraft	22
Operating leases rental expense	16,300,000	9,000,000
Collective Bargaining Agreements and/or Unions	51.00%
Employee Agreement Escalation Rate	up to 12%
Work force reductions costs	2,200,000
Officer Compensation Expense	2,000,000
Possible litigation damages from early termination of agreement	The claimants allege that an agreement between the parties was terminated without justification and seek damages of $16.3 million.
Description of Guarantees Given by Parent Company	We had guaranteed the repayment of up to £10 million ($15.7 million) of the debt of FBS Limited, an unconsolidated affiliate, which has been repaid. Therefore, as of June 30, 2012 we are no longer a guarantor of this debt.
Sale Leaseback Previously Included In Construction In Progress [Member]
Sale Leaseback Transaction [Line Items]
Number of aircraft sale leaseback			2
Sale price of the aircraft leaseback			23,400,000
Fiscal Year 2013 To Fiscal Year 2015 [Member]
Sale Leaseback Transaction [Line Items]
Monthly Rent payment	1,010,000
Number of leased aircraft	6
Fiscal Year 2016 To Fiscal Year 2018 [Member]
Sale Leaseback Transaction [Line Items]
Monthly Rent payment	1,200,000
Number of leased aircraft	7
Fiscal Year 2023 [Member]
Sale Leaseback Transaction [Line Items]
Monthly Rent payment	350,000
Number of leased aircraft	9
Commitments [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Beginning of quarter	15
Aircraft delivered	(2)
Exercised options	4
End of quarter	17
Options [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Beginning of quarter	40
Aircraft delivered	0
Exercised options	(4)
End of quarter	36
Remainder of Year 2013 [Member]
Aircraft Purchase Contracts [Line Items]
Aircraft Purchase Commitments - Total	158,619,000
Aircraft Purchase Options - Total	87,062,000
Number of aircraft purchase commitments - Large	7
Number of aircraft purchase commitments - Total	7
Number of aircraft purchase options - Medium	0
Number of aircraft purchase options - Large	0
Number of aircraft purchase options - Total	0
Year 2014 [Member]
Aircraft Purchase Contracts [Line Items]
Aircraft Purchase Commitments - Total	58,268,000
Aircraft Purchase Options - Total	170,991,000
Number of aircraft purchase commitments - Large	4
Number of aircraft purchase commitments - Total	4
Number of aircraft purchase options - Medium	5
Number of aircraft purchase options - Large	3
Number of aircraft purchase options - Total	8
Year 2015 [Member]
Aircraft Purchase Contracts [Line Items]
Aircraft Purchase Commitments - Total	46,103,000
Aircraft Purchase Options - Total	175,707,000
Number of aircraft purchase commitments - Large	3
Number of aircraft purchase commitments - Total	3
Number of aircraft purchase options - Medium	5
Number of aircraft purchase options - Large	4
Number of aircraft purchase options - Total	9
Year 2016 [Member]
Aircraft Purchase Contracts [Line Items]
Aircraft Purchase Commitments - Total	30,582,000
Aircraft Purchase Options - Total	184,890,000
Number of aircraft purchase commitments - Large	2
Number of aircraft purchase commitments - Total	2
Number of aircraft purchase options - Medium	2
Number of aircraft purchase options - Large	7
Number of aircraft purchase options - Total	9
Year 2017 and Thereafter [Member]
Aircraft Purchase Contracts [Line Items]
Aircraft Purchase Commitments - Total	13,771,000
Aircraft Purchase Options - Total	$ 194,487,000
Number of aircraft purchase commitments - Large	1
Number of aircraft purchase commitments - Total	1
Number of aircraft purchase options - Medium	0
Number of aircraft purchase options - Large	10
Number of aircraft purchase options - Total	10