FAIR VALUE DISCLOSURES (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
Dec. 31, 2014 aircraft	Dec. 31, 2013 aircraft	Dec. 31, 2014 aircraft	Dec. 31, 2013 aircraft	Mar. 31, 2014
Fair Value [Line Items]
Inventories	$ 139,027,000us-gaap_InventoryNet		$ 139,027,000us-gaap_InventoryNet		137,463,000us-gaap_InventoryNet
Assets held for sale	25,837,000		25,837,000		29,276,000
Impairment of inventories	(3,805,000)us-gaap_InventoryWriteDown	0us-gaap_InventoryWriteDown	(7,167,000)us-gaap_InventoryWriteDown	(2,364,000)us-gaap_InventoryWriteDown
Impairment charges on aircraft held for sale	(25,614,000)	(1,234,000)	(28,751,000)	(3,414,000)
Gain (Loss) on Sale of Assets and Asset Impairment Charges	(29,419,000)	(1,234,000)	(35,918,000)	(5,778,000)
Number of aircraft impaired	12	3	18	6
Other accrued liabilities	54,440,000us-gaap_OtherLiabilitiesCurrent		54,440,000us-gaap_OtherLiabilitiesCurrent		45,853,000us-gaap_OtherLiabilitiesCurrent
Other liabilities and deferred credits	59,953,000us-gaap_OtherLiabilitiesNoncurrent		59,953,000us-gaap_OtherLiabilitiesNoncurrent		78,126,000us-gaap_OtherLiabilitiesNoncurrent
Carrying value of total debt	818,188,000		818,188,000		841,302,000
Fair value of total debt	822,755,000us-gaap_DebtInstrumentFairValue		822,755,000us-gaap_DebtInstrumentFairValue		900,780,000us-gaap_DebtInstrumentFairValue
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent Consideration- beginning balance			31,322,000
Change in fair value of contingent consideration			773,000
Contingent Consideration- ending balance	32,095,000		32,095,000
Fair Value, Measurements, Recurring [Member]
Fair Value [Line Items]
Rabbi Trust investments	5,546,000		5,546,000		6,599,000
Total Assets Recurring	5,546,000		5,546,000		6,599,000
Other accrued liabilities	7,845,000		7,845,000		7,652,000
Other liabilities and deferred credits	24,250,000		24,250,000		23,670,000
Total Liabilities Recurring	32,095,000		32,095,000		31,322,000
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value [Line Items]
Rabbi Trust investments	5,546,000		5,546,000		6,599,000
Total Assets Recurring	5,546,000		5,546,000		6,599,000
Other accrued liabilities	0		0		0
Other liabilities and deferred credits	0		0		0
Total Liabilities Recurring	0		0		0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value [Line Items]
Rabbi Trust investments	0		0		0
Total Assets Recurring	0		0		0
Other accrued liabilities	0		0		0
Other liabilities and deferred credits	0		0		0
Total Liabilities Recurring	0		0		0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value [Line Items]
Rabbi Trust investments	0		0		0
Total Assets Recurring	0		0		0
Other accrued liabilities	7,845,000		7,845,000		7,652,000
Other liabilities and deferred credits	24,250,000		24,250,000		23,670,000
Total Liabilities Recurring	32,095,000		32,095,000		31,322,000
Fair Value, Measurements, Nonrecurring [Member]
Fair Value [Line Items]
Inventories	4,588,000	13,424,000	4,588,000	13,424,000
Assets held for sale	15,313,000	6,733,000	15,313,000	6,733,000
Total Assets Non Recurring	19,901,000	20,157,000	19,901,000	20,157,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value [Line Items]
Inventories	0	0	0	0
Assets held for sale	0	0	0	0
Total Assets Non Recurring	0	0	0	0
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value [Line Items]
Inventories	4,588,000	13,424,000	4,588,000	13,424,000
Assets held for sale	15,313,000	6,733,000	15,313,000	6,733,000
Total Assets Non Recurring	19,901,000	20,157,000	19,901,000	20,157,000
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value [Line Items]
Inventories	0	0	0	0
Assets held for sale	0	0	0	0
Total Assets Non Recurring	0	0	0	0
Cougar [Member]
Fair Value [Line Items]
Fair Value Inputs, Discount Rate	4.00%				4.00%
Senior Notes [Member] \| Senior Notes Due 2022 [Member]
Fair Value [Line Items]
Carrying value of total debt	401,535,000		401,535,000		450,000,000
Fair value of total debt	399,527,000		399,527,000		477,000,000
Senior Notes [Member] \| Convertible Senior Notes Due 2038 [Member]
Fair Value [Line Items]
Carrying value of total debt	113,025,000		113,025,000		109,904,000
Fair value of total debt	119,600,000		119,600,000		142,382,000
Term Loan [Member]
Fair Value [Line Items]
Carrying value of total debt	223,288,000		223,288,000		226,604,000
Fair value of total debt	223,288,000		223,288,000		226,604,000
Revolving Credit Facility [Member]
Fair Value [Line Items]
Carrying value of total debt	58,500,000		58,500,000		24,000,000
Fair value of total debt	58,500,000		58,500,000		24,000,000
Eastern Airways [Member]
Fair Value [Line Items]
Carrying value of total debt	21,840,000		21,840,000		29,911,000
Fair value of total debt	21,840,000		21,840,000		29,911,000
Other debt [Member]
Fair Value [Line Items]
Carrying value of total debt	0		0		883,000
Fair value of total debt	$ 0		$ 0		883,000

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