FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Transfers out of Level 1 and into Level 2 related to assets and liabilities measured on a recurring and nonrecurring basis	$ 0	$ 0
Transfers out of Level 2 and into Level 1 related to assets and liabilities measured on a recurring and nonrecurring basis	0	0
Transfers out of Level 1 and into Level 2 related to liabilities measured on a recurring and nonrecurring basis	0	0
Transfers out of Level 2 and into Level 1 related to liabilities measured on a recurring and nonrecurring basis	0	0
Assets held for sale
Assets held for sale	59,400,000
Proceeds from sale of assets held for sale	24,500,000
Gain on sale of assets held for sale	9,200,000
Impairment charges for assets no longer in use and held for sale		0
Property and equipment
Fair value adjustments	0	0
Warrants to purchase common shares
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets		74,437,000
Recurring Basis | Level 1 | Deferred compensation plan assets: Mutual funds, money market accounts and equity securities
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	9,456,000	6,931,000
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	552,928,000	497,390,000
Recurring Basis | Level 2 | Foreign exchange forward contracts
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	8,186,000	27,563,000
Total Liabilities	(17,406,000)	(15,290,000)
Recurring Basis | Level 2 | Deferred compensation plan assets: Mutual funds, money market accounts and equity securities
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	36,751,000	40,972,000
Recurring Basis | Level 3 | Deferred purchase price receivable
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	470,908,000	412,357,000
Recurring Basis | Level 3 | Warrants to purchase common shares
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets		74,437,000
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	(11,300,000)	(25,000,000)
Recurring Basis | Total | Money market funds and time deposits
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	552,928,000	497,390,000
Recurring Basis | Total | Deferred purchase price receivable
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	470,908,000	412,357,000
Recurring Basis | Total | Foreign exchange forward contracts
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	8,186,000	27,563,000
Total Liabilities	(17,406,000)	(15,290,000)
Recurring Basis | Total | Warrants to purchase common shares
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets		74,437,000
Recurring Basis | Total | Deferred compensation plan assets: Mutual funds, money market accounts and equity securities
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	46,207,000	47,903,000
Recurring Basis | Total | Contingent consideration in connection with acquisitions
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Liabilities	(11,300,000)	(25,000,000)
Nonrecurring Basis | Level 2
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale	43,504,000	11,089,000
Property and equipment		25,331,000
Nonrecurring Basis | Total
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale	43,504,000	11,089,000
Property and equipment		$ 25,331,000