FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Assets held for sale
Impairment charges for assets no longer in use and held for sale	$ 0	$ 0
Property and Equipment, Net
Fair value adjustments	0
Transfers out of Level 1 and into Level 2 related to restructuring activities	0	0
Transfers out of Level 2 and into Level 1 related to restructuring activities	0	0
Recurring Basis | Level 1 | Available for sale investments
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets		5,994
Recurring Basis | Level 1 | Mutual funds, money market accounts and equity securities
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	6,931	3,411
Recurring Basis | Level 2 | Money market funds and time deposits
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	497,390	343,906
Recurring Basis | Level 2 | Foreign exchange forward contracts
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	27,563	20,969
Total Liabilities	(15,290)	(8,105)
Recurring Basis | Level 2 | Mutual funds, money market accounts and equity securities
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	40,972	54,241
Recurring Basis | Level 3 | Deferred purchase price receivable
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	412,357	514,895
Recurring Basis | Level 3 | Warrants to purchase common shares
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	74,437
Recurring Basis | Level 3 | Contingent consideration in connection with acquisitions
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Liabilities	(25,000)	(1,151)
Recurring Basis | Total | Money market funds and time deposits
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	497,390	343,906
Recurring Basis | Total | Deferred purchase price receivable
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	412,357	514,895
Recurring Basis | Total | Foreign exchange forward contracts
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	27,563	20,969
Total Liabilities	(15,290)	(8,105)
Recurring Basis | Total | Warrants to purchase common shares
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	74,437
Recurring Basis | Total | Available for sale investments
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets		5,994
Recurring Basis | Total | Mutual funds, money market accounts and equity securities
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	47,903	57,652
Recurring Basis | Total | Contingent consideration in connection with acquisitions
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Liabilities	(25,000)	(1,151)
Nonrecurring Basis | Level 2
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale	11,089	16,701
Property and equipment	25,331
Nonrecurring Basis | Total
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale	11,089	16,701
Property and equipment	$ 25,331