FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Recurring Basis | Level 1 | Available for sale investments
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	$ 1,775	$ 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	6,066	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	495,829	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	24,789	20,969
Total Liabilities	(15,294)	(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	39,939	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	462,014	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	64,671
Recurring Basis | Total | Money market funds and time deposits
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	495,829	343,906
Recurring Basis | Total | Deferred purchase price receivable
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	462,014	514,895
Recurring Basis | Total | Foreign exchange forward contracts
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	24,789	20,969
Total Liabilities	(15,294)	(8,105)
Recurring Basis | Total | Available for sale investments
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	1,775	5,994
Recurring Basis | Total | Warrants to purchase common shares
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	64,671
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	46,005	57,652
Nonrecurring Basis | Level 2
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale	16,871	16,701
Property and equipment	18,367
Nonrecurring Basis | Total
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale	16,871	16,701
Property and equipment	$ 18,367