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FAIR VALUE (Schedule of Carrying Value and Fair Value of Financial Liabilities) (Details) (Convertible subordinated debt, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Mar. 31, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Carrying Value $ 203,735us-gaap_LongTermDebt $ 203,735us-gaap_LongTermDebt
Level 2 fair value measurements    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Fair Value $ 219,820us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember
$ 203,820us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleSubordinatedDebtMember