ACQUISITIONS Fair Value of Acquired Identifiable Intangible Assets and Related Estimates Useful Lives (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Developed technology	Mar. 31, 2014 Customer relationships	Oct. 31, 2012 Onpath	Oct. 31, 2012 Onpath Developed technology	Oct. 31, 2012 Onpath Customer relationships	Jul. 20, 2012 Accanto	Jul. 20, 2012 Accanto Developed technology	Jul. 20, 2012 Accanto Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of finite-lived intangible assets acquired				$ 10,970	$ 4,970	$ 6,000	$ 5,280	$ 3,500	$ 1,780
Estimated useful life of identifiable finite-lived intangible assets acquired	10 years 1 month 6 days	6 years 3 months 18 days	13 years 3 months 18 days	7 years 6 months	8 years	7 years	7 years 3 months 18 days	8 years	6 years