FAIR VALUE (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Recurring basis
Fair value
Assets, Total	$ 206,018,000	$ 156,704,000
Level 1 \| Recurring basis
Fair value
Assets, Total	76,226,000	131,983,000
Level 2 \| Recurring basis
Fair value
Assets, Total	129,792,000	14,065,000
Liabilities, Total	(541,000)	(522,000)
Level 3 \| Recurring basis
Fair value
Assets, Total		10,656,000
Total \| Recurring basis
Fair value
Liabilities, Total	(541,000)	(522,000)
Interest rate cap contracts \| Level 2 \| Recurring basis
Fair value
Interest rate cap contracts		20,000
Interest rate cap contracts \| Total \| Recurring basis
Fair value
Interest rate cap contracts		20,000
Interest rate swap contract \| Level 2 \| Recurring basis
Fair value
Interest rate swap contract	(541,000)	(522,000)
Interest rate swap contract \| Total \| Recurring basis
Fair value
Interest rate swap contract	(541,000)	(522,000)
Cash equivalents \| Level 1 \| Recurring basis
Fair value
Available for sale securities	1,201,000	1,201,000
Cash equivalents \| Total \| Recurring basis
Fair value
Available for sale securities	1,201,000	1,201,000
U.S. government and agency debt securities
Fair value
Transfer of securities from level 1 to level 2	87,100,000
U.S. government and agency debt securities \| Level 1 \| Recurring basis
Fair value
Available for sale securities	75,025,000	98,398,000
U.S. government and agency debt securities \| Level 2 \| Recurring basis
Fair value
Available for sale securities	87,126,000
U.S. government and agency debt securities \| Total \| Recurring basis
Fair value
Available for sale securities	162,151,000	98,398,000
International government agency debt securities
Fair value
Transfer of securities from level 1 to level 2	3,100,000
International government agency debt securities \| Level 1 \| Recurring basis
Fair value
Available for sale securities		30,902,000
International government agency debt securities \| Level 2 \| Recurring basis
Fair value
Available for sale securities	13,156,000
International government agency debt securities \| Level 3 \| Recurring basis
Fair value
Available for sale securities		5,001,000
International government agency debt securities \| Total \| Recurring basis
Fair value
Available for sale securities	13,156,000	35,903,000
Corporate debt securities \| Level 2 \| Recurring basis
Fair value
Available for sale securities	29,510,000	14,045,000
Corporate debt securities \| Level 3 \| Recurring basis
Fair value
Available for sale securities		5,655,000
Corporate debt securities \| Total \| Recurring basis
Fair value
Available for sale securities	29,510,000	19,700,000
Strategic equity investments \| Level 1 \| Recurring basis
Fair value
Available for sale securities		1,482,000
Strategic equity investments \| Total \| Recurring basis
Fair value
Available for sale securities		$ 1,482,000

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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