FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Recurring Basis Level 1 Deferred compensation plan assets: Mutual funds, money market accounts and equity securities	Mar. 31, 2013 Recurring Basis Level 1 Deferred compensation plan assets: Mutual funds, money market accounts and equity securities	Dec. 31, 2013 Recurring Basis Level 2 Money market funds and time deposits (included in cash and cash equivalents of the condensed consolidated balance sheet)	Mar. 31, 2013 Recurring Basis Level 2 Money market funds and time deposits (included in cash and cash equivalents of the condensed consolidated balance sheet)	Dec. 31, 2013 Recurring Basis Level 2 Foreign exchange forward contracts	Mar. 31, 2013 Recurring Basis Level 2 Foreign exchange forward contracts	Dec. 31, 2013 Recurring Basis Level 2 Deferred compensation plan assets: Mutual funds, money market accounts and equity securities	Mar. 31, 2013 Recurring Basis Level 2 Deferred compensation plan assets: Mutual funds, money market accounts and equity securities	Dec. 31, 2013 Recurring Basis Level 3 Deferred purchase price receivable	Mar. 31, 2013 Recurring Basis Level 3 Deferred purchase price receivable	Mar. 31, 2013 Recurring Basis Level 3 Warrants to purchase common shares	Dec. 31, 2013 Recurring Basis Level 3 Contingent consideration in connection with business acquisitions	Mar. 31, 2013 Recurring Basis Level 3 Contingent consideration in connection with business acquisitions	Dec. 31, 2013 Recurring Basis Total Money market funds and time deposits (included in cash and cash equivalents of the condensed consolidated balance sheet)	Mar. 31, 2013 Recurring Basis Total Money market funds and time deposits (included in cash and cash equivalents of the condensed consolidated balance sheet)	Dec. 31, 2013 Recurring Basis Total Deferred purchase price receivable	Mar. 31, 2013 Recurring Basis Total Deferred purchase price receivable	Dec. 31, 2013 Recurring Basis Total Foreign exchange forward contracts	Mar. 31, 2013 Recurring Basis Total Foreign exchange forward contracts	Mar. 31, 2013 Recurring Basis Total Warrants to purchase common shares	Dec. 31, 2013 Recurring Basis Total Deferred compensation plan assets: Mutual funds, money market accounts and equity securities	Mar. 31, 2013 Recurring Basis Total Deferred compensation plan assets: Mutual funds, money market accounts and equity securities	Dec. 31, 2013 Recurring Basis Total Contingent consideration in connection with business acquisitions	Mar. 31, 2013 Recurring Basis Total Contingent consideration in connection with business acquisitions	Dec. 31, 2013 Nonrecurring Basis Level 2	Mar. 31, 2013 Nonrecurring Basis Level 2	Dec. 31, 2013 Nonrecurring Basis Total	Mar. 31, 2013 Nonrecurring Basis Total
Financial Instruments Measured at Fair Value on a Recurring Basis and Nonrecurring Basis
Total Assets			$ 9,372,000	$ 6,931,000	$ 882,918,000	$ 497,390,000	$ 17,987,000	$ 27,563,000	$ 42,645,000	$ 40,972,000	$ 528,830,000	$ 412,357,000	$ 74,437,000			$ 882,918,000	$ 497,390,000	$ 528,830,000	$ 412,357,000	$ 17,987,000	$ 27,563,000	$ 74,437,000	$ 52,017,000	$ 47,903,000
Total Liabilities							(16,877,000)	(15,290,000)						(12,300,000)	(25,000,000)					(16,877,000)	(15,290,000)				(12,300,000)	(25,000,000)
Assets held for sale																											18,882,000	11,089,000	18,882,000	11,089,000
Property and equipment																												25,331,000		25,331,000
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
Assets held for sale
Impairment charges for assets held for sale	4,300,000
Carrying value of assets held for sale properties sold	$ 9,100,000