FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details 2) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Transfers out of Level 2 and into Level 1 related to assets and 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 long lived assets held for ale	41,500,000	24,500,000
Gain on sale of assets held for sale	12,100,000	9,200,000
Impairment charges for assets no longer in use and held for sale	0
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	9,068,000	9,456,000
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	674,859,000	552,928,000
Recurring Basis | Level 2 | Foreign exchange forward contracts (Note 7)
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	25,829,000	8,186,000
Total Liabilities	(31,057,000)	(17,406,000)
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	37,041,000	36,751,000
Recurring Basis | Level 3 | Deferred purchase price receivable (Note 9)
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	600,672,000	470,908,000
Recurring Basis | Level 3 | Contingent consideration in connection with business acquisitions
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Liabilities	(4,500,000)	(11,300,000)
Recurring Basis | Total | Money market funds and time deposits
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	674,859,000	552,928,000
Recurring Basis | Total | Deferred purchase price receivable (Note 9)
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	600,672,000	470,908,000
Recurring Basis | Total | Foreign exchange forward contracts (Note 7)
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets	25,829,000	8,186,000
Total Liabilities	(31,057,000)	(17,406,000)
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	46,109,000	46,207,000
Recurring Basis | Total | Contingent consideration in connection with business acquisitions
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Liabilities	(4,500,000)	(11,300,000)
Nonrecurring Basis | Level 2
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale		43,504,000
Nonrecurring Basis | Total
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Assets held for sale		$ 43,504,000