COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended	23 Months Ended
	Mar. 31, 2015 aircraft Employee	Jun. 30, 2015 USD ($) aircraft Facility Months	Jun. 30, 2014 USD ($) aircraft	Mar. 31, 2016 USD ($) aircraft	May. 31, 2017 USD ($) aircraft
Options [Abstract]
Number of signed client contracts		11
Analysis Of Aircraft Orders And Options [Line Items]
Aircraft Delivered		(2)	(9)
Operating leases rental expense | $		$ 53,900	$ 33,100
Sale Leaseback Transaction, Lease Terms, Number of Months, Maximum | Months		180
Sale Leaseback Transaction, Lease Terms, Maximum Number of Months, Renewal Option | Months		240
Monthly rent payment | $		$ 13,677
Number of leased aircraft		84
Site Contingency, Number of Locations | Facility		3
Loss Contingency, Range of Possible Loss, Minimum | $		$ 6,000
Loss Contingency, Range of Possible Loss, Maximum | $		9,000
Voluntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Voluntary Separation Program, Number Of Employees Offered | Employee	2,888
Voluntary Separation Program, Number Of Employees Acceptance | Employee	137
Severance Costs | $		6,400
Involuntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $		1,600
Direct cost [Member] | Voluntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $		5,800
Direct cost [Member] | Involuntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $		500
General and administrative expense [Member] | Voluntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $		600
General and administrative expense [Member] | Involuntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $		$ 1,100
Unionized Employees Concentration Risk [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Collective bargaining agreements and/or unions		47.00%
Employee agreement escalation rate		6.00%
Medium Aircraft [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Aircraft Delivered		(1)	(3)
Large Aircraft [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Aircraft Delivered		(1)	(6)
Aircraft [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Operating leases rental expense | $		$ 46,600	$ 26,400
Aircraft [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due Remainder Of Fiscal Year		21
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Two		10
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Three		8
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Four		4
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Five And Thereafter		3
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required		46
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year | $		$ 301,157
Unrecorded Unconditional Purchase Obligation, Due within Two Years | $		170,975
Unrecorded Unconditional Purchase Obligation, Due within Three Years | $		108,094
Unrecorded Unconditional Purchase Obligation, Due within Four Years | $		58,946
Unrecorded Unconditional Purchase Obligation, Due within Five Years And After | $		31,550
Purchase Commitments - Total | $		$ 670,722
Options [Abstract]
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due Remainder Of Fiscal Year		0
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Two		7
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Three		14
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Four		0
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Five And Thereafter		0
Unrecorded Conditional Purchase Obligation Maximum Quantity Required		21
Unrecorded Conditional Purchase Obligatio Due In Remainder Of Fiscal Year | $		$ 46,180
Unrecorded Conditional Purchase Obligation Balance On Second Anniversary | $		202,279
Unrecorded Conditional Purchase Obligation Balance On Third Anniversary | $		184,692
Unrecorded Conditional Purchase Obligation Balance On Fourth Anniversary | $		0
Unrecorded Conditional Purchase Obligation Due within Five Years And After | $		0
Aircraft Purchase Options - Total | $		$ 433,151
Aircraft [Member] | Medium Aircraft [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due Remainder Of Fiscal Year		10
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Two		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Three		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Four		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Five And Thereafter		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required		10
Options [Abstract]
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due Remainder Of Fiscal Year		0
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Two		2
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Three		7
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Four		0
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Five And Thereafter		0
Unrecorded Conditional Purchase Obligation Maximum Quantity Required		9
Aircraft [Member] | Large Aircraft [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due Remainder Of Fiscal Year		7
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Two		6
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Three		8
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Four		4
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Five And Thereafter		3
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required		28
Options [Abstract]
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due Remainder Of Fiscal Year		0
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Two		5
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Three		7
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Four		0
Unrecorded Conditional Purchase Obligation, Maximum Quantity Required, Due In Year Five And Thereafter		0
Unrecorded Conditional Purchase Obligation Maximum Quantity Required		12
Aircraft [Member] | Medium and Large [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year | $		$ 244,379
Unrecorded Unconditional Purchase Obligation, Due within Two Years | $		112,547
Unrecorded Unconditional Purchase Obligation, Due within Three Years | $		108,094
Unrecorded Unconditional Purchase Obligation, Due within Four Years | $		58,946
Unrecorded Unconditional Purchase Obligation, Due within Five Years And After | $		31,550
Purchase Commitments - Total | $		$ 555,516
Aircraft [Member] | SAR Configured [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due Remainder Of Fiscal Year		4
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Two		4
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Three		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Four		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required, Due In Year Five And Thereafter		0
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required		8
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year | $		$ 56,778
Unrecorded Unconditional Purchase Obligation, Due within Two Years | $		58,428
Unrecorded Unconditional Purchase Obligation, Due within Three Years | $		0
Unrecorded Unconditional Purchase Obligation, Due within Four Years | $		0
Unrecorded Unconditional Purchase Obligation, Due within Five Years And After | $		0
Purchase Commitments - Total | $		$ 115,206
Commitments [Member]
Options [Abstract]
Number of contingent aircraft orders		17
Analysis Of Aircraft Orders And Options [Line Items]
Beginning of quarter		45		46	46
Aircraft Delivered		(2)
Exercised options		(3)
Expired Options		0
End of quarter	45	46
Options [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Beginning of quarter		30		21	21
Aircraft Delivered		0
Exercised options		(3)
Expired Options		(6)
End of quarter	30	21
Other Commitments [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Purchase Commitments - Total | $		$ 325,800
Nine months ending March 31, 2016 to fiscal year 2017
Analysis Of Aircraft Orders And Options [Line Items]
Monthly rent payment | $		$ 1,680
Number of leased aircraft		12
Fiscal year 2018 to fiscal year 2020
Analysis Of Aircraft Orders And Options [Line Items]
Monthly rent payment | $		$ 9,294
Number of leased aircraft		48
Fiscal year 2021 to fiscal year 2024
Analysis Of Aircraft Orders And Options [Line Items]
Monthly rent payment | $		$ 2,703
Number of leased aircraft		24
Scenario, Forecast [Member] | Voluntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $					$ 7,200
Scenario, Forecast [Member] | Involuntary Separation Program [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Severance Costs | $				$ 5,000
Year One [Member] | Unionized Employees Concentration Risk [Member]
Analysis Of Aircraft Orders And Options [Line Items]
Collective bargaining agreements and/or unions		20.00%