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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	Sep. 30, 2014	Mar. 31, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Carrying Value	$ 203,735	$ 203,735
Level 2 fair value measurements
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value	$ 204,298	$ 203,820

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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