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FAIR VALUE DISCLOSURES (Details) $ in Thousands	3 Months Ended		12 Months Ended
FAIR VALUE DISCLOSURES (Details) $ in Thousands	Jun. 30, 2015 USD ($) aircraft	Jun. 30, 2014 USD ($) aircraft	Mar. 31, 2015 USD ($)	Apr. 17, 2015 USD ($)
Fair Value [Line Items]
Inventories	$ 151,947		$ 147,169
Assets held for sale	38,636		57,827
Impairment of inventories	(5,439)	$ 0
Impairment charges on aircraft held for sale	(9,862)	(2,579)
Loss on sale of assets and asset impairment charges	$ (15,301)	$ (2,579)
Number of aircraft impaired \| aircraft	9	4
Total Assets Recurring	$ 2,381		2,379
Other accrued liabilities	79,239		82,605
Other liabilities and deferred credits	31,224		39,782
Total Liabilities Recurring	31,403		38,905
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent Consideration- beginning balance	38,905
Change in fair value of contingent consideration	498
Earn-out payment	(8,000)
Contingent Consideration- ending balance	31,403		38,905
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	945,201		864,422
Fair value of total debt	941,183		845,524
Fair Value, Measurements, Recurring [Member]
Fair Value [Line Items]
Rabbi Trust investments	2,381		2,379
Other accrued liabilities	26,314		33,938
Other liabilities and deferred credits	5,089		4,967
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value [Line Items]
Rabbi Trust investments	2,381		2,379
Total Assets Recurring	2,381		2,379
Other accrued liabilities	0		0
Other liabilities and deferred credits	0		0
Total Liabilities Recurring	0		0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value [Line Items]
Rabbi Trust investments	0		0
Total Assets Recurring	0		0
Other accrued liabilities	0		0
Other liabilities and deferred credits	0		0
Total Liabilities Recurring	0		0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value [Line Items]
Rabbi Trust investments	0		0
Total Assets Recurring	0		0
Other accrued liabilities	26,314		33,938
Other liabilities and deferred credits	5,089		4,967
Total Liabilities Recurring	31,403		$ 38,905
Fair Value, Measurements, Nonrecurring [Member]
Fair Value [Line Items]
Inventories	13,922
Assets held for sale	35,523	$ 6,400
Total Assets Non Recurring	49,445	6,400
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value [Line Items]
Inventories	0
Assets held for sale	0	0
Total Assets Non Recurring	0	0
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value [Line Items]
Inventories	13,922
Assets held for sale	35,523	6,400
Total Assets Non Recurring	49,445	6,400
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value [Line Items]
Inventories	0
Assets held for sale	0	0
Total Assets Non Recurring	$ 0	$ 0
Airnorth [Member]
Fair Value [Line Items]
Fair Value Inputs, Discount Rate	2.00%		2.00%
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent Consideration- beginning balance	$ 6,400
Contingent Consideration- ending balance	$ 6,600		$ 6,400
Cougar [Member]
Fair Value [Line Items]
Fair Value Inputs, Discount Rate	4.00%		4.00%
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent Consideration- beginning balance	$ 32,500
Contingent Consideration- ending balance	24,800		$ 32,500
Senior Notes [Member] \| Senior Notes Due 2022 [Member]
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	401,535		401,535
Fair value of total debt	397,520		381,458
Term Loan [Member]
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	346,084		222,179	$ 222,600
Fair value of total debt	346,084		222,179
Convertible Notes Payable [Member]
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	1,869		114,109
Fair value of total debt	1,866		115,288
Revolving Credit Facility [Member]
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	155,000		83,800
Fair value of total debt	155,000		83,800
Other Debt [Member] \| Airnorth [Member]
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	21,929		23,119
Fair value of total debt	21,929		23,119
Other Debt [Member] \| Eastern Airways [Member]
Debt Instrument, Fair Value Disclosure [Abstract]
Carrying value of total debt	18,784		19,680
Fair value of total debt	$ 18,784		$ 19,680