FAIR VALUE DISCLOSURES (Details) (USD $)	12 Months Ended
	Mar. 31, 2013 number	Mar. 31, 2012 number	Mar. 31, 2011
Fair Value [Line Items]
Inventories	$ 153,969,000	$ 157,825,000
Assets held for sale	8,290,000	18,710,000
Contingent consideration	34,245,000
FV Gain (Loss) Total	4,360,000	(54,887,000)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value starting balance	0
Contingent consideration	34,245,000
Change in fair value of contingent consideration	1,380,000
Fair value ending balance	35,625,000	0
Carrying value of total debt	787,269,000	757,245,000
Fair value of total debt	847,767,000	789,925,000
Assets Held For Sale [Member]
Fair Value [Line Items]
Assets held for sale	8,300,000	18,700,000
Impairment of Long-Lived Assets	(4,362,000)	(26,278,000)	1,500,000
Number of impairment of long lived assets to be disposed of	10	19
Inventory [Member]
Fair Value [Line Items]
Impairment of Long-Lived Assets		(25,919,000)
Medium Aircraft [Member]
Fair Value [Line Items]
Impairment of Long-Lived Assets		(2,690,000)
Large Aircraft [Member]
Fair Value [Line Items]
Number of aircraft reclassed held for sale to property and eqiupment	4
Gain from aircraft reclassed from held for sale to property and eqiupment	8,722,000
Senior Notes Due 2022 [Member]
Fair Value [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.25%
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value of total debt	450,000,000	0
Fair value of total debt	484,875,000	0
Term Loan [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value of total debt	230,625,000	245,000,000
Fair value of total debt	230,625,000	245,000,000
Convertible Senior Notes [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value of total debt	106,196,000	102,599,000
Fair value of total debt	131,819,000	120,750,000
Senior Notes Due 2017 [Member]
Fair Value [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value of total debt	0	350,346,000
Fair value of total debt	0	364,875,000
Revolving Credit Facility [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value of total debt	0	59,300,000
Fair value of total debt	0	59,300,000
Other Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value of total debt	448,000	0
Fair value of total debt	448,000	0
Fair Value, Inputs, Level 1 [Member]
Fair Value [Line Items]
Total assets	0	0
Total assets	4,837,000	4,171,000
Total liabilities	0
Fair Value, Inputs, Level 1 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value [Line Items]
Inventories		0
Aircraft and equipment	0	0
Assets held for sale	0	0
Fair Value, Inputs, Level 1 [Member] | FV Other Assets [Member]
Fair Value [Line Items]
Rabbi Trust investments	4,837,000	4,171,000
Fair Value, Inputs, Level 1 [Member] | FV Other Liabilities And Deferred Credits [Member]
Fair Value [Line Items]
Contingent consideration	0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration	0
Fair Value, Inputs, Level 2 [Member]
Fair Value [Line Items]
Total assets	15,985,000	47,962,000
Total assets	0	0
Total liabilities	0
Fair Value, Inputs, Level 2 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value [Line Items]
Inventories		21,482,000
Aircraft and equipment	14,385,000	13,700,000
Assets held for sale	1,600,000	12,780,000
Fair Value, Inputs, Level 2 [Member] | FV Other Assets [Member]
Fair Value [Line Items]
Rabbi Trust investments	0	0
Fair Value, Inputs, Level 2 [Member] | FV Other Liabilities And Deferred Credits [Member]
Fair Value [Line Items]
Contingent consideration	0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration	0
Fair Value, Inputs, Level 3 [Member]
Fair Value [Line Items]
Total assets	0	0
Total assets	0	0
Total liabilities	35,625,000
Fair Value, Inputs, Level 3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value [Line Items]
Inventories		0
Aircraft and equipment	0	0
Assets held for sale	0	0
Fair Value, Inputs, Level 3 [Member] | FV Other Assets [Member]
Fair Value [Line Items]
Rabbi Trust investments	0	0
Fair Value, Inputs, Level 3 [Member] | FV Other Liabilities And Deferred Credits [Member]
Fair Value [Line Items]
Contingent consideration	35,625,000
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration	35,625,000
Estimate Of Fair Value, Fair Value Disclosure [Member]
Fair Value [Line Items]
Total assets	15,985,000
Total assets	4,837,000	4,171,000
Total liabilities	35,625,000
Estimate Of Fair Value, Fair Value Disclosure [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value [Line Items]
Inventories		21,482,000
Aircraft and equipment	14,385,000	13,700,000
Assets held for sale	1,600,000	12,780,000
Total assets		47,962,000
Estimate Of Fair Value, Fair Value Disclosure [Member] | FV Other Assets [Member]
Fair Value [Line Items]
Rabbi Trust investments	4,837,000	4,171,000
Estimate Of Fair Value, Fair Value Disclosure [Member] | FV Other Liabilities And Deferred Credits [Member]
Fair Value [Line Items]
Contingent consideration	35,625,000
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration	$ 35,625,000