ACQUISITIONS - Additional Information (Detail) (USD $)	6 Months Ended							0 Months Ended			0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Sep. 30, 2013 Unified Service Delivery	Mar. 31, 2013 Unified Service Delivery	Sep. 30, 2013 Test Automation	Mar. 31, 2013 Test Automation	Oct. 31, 2012 Onpath	Oct. 31, 2012 Onpath Unified Service Delivery	Oct. 31, 2012 Onpath Test Automation	Jul. 20, 2012 Accanto Systems Srl
Business Acquisition [Line Items]
Preliminary purchase price allocation period, years	1 year
Total purchase price								$ 41,000,000
Cash consideration to employee and directors								8,200,000
Transaction bonus considered as compensation								4,000,000
Goodwill acquired	202,863,000		202,453,000	200,500,000	199,500,000	2,400,000	3,000,000	19,897,000	17,500,000	2,400,000	11,157,000
Weighted average useful life of identifiable intangible assets acquired	10 years 1 month 6 days							7 years 6 months			7 years 3 months 18 days
Net tax credit recorded for research and development activities of acquiree								517,000
Cash payments to acquire business	0	15,000,000									15,000,000
Acquired software intangible, tax deductible amount											2,100,000
Business acquisition, revenue recorded	$ 6,000,000