GOODWILL AND INTANGIBLE ASSETS - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 203,201,000		$ 203,201,000		$ 202,453,000
Carrying value of intangible assets	59,827,000		59,827,000		63,827,000
Payments to acquire software rights			713,000	197,000
Weighted average useful life of acquired intangible assets			10 years 1 month 6 days
Amortization expenses	860,000	846,000	2,571,000	2,077,000
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	18,600,000		18,600,000		18,600,000
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Payments to acquire software rights	500,000
Weighted average useful life of acquired intangible assets	6 years 3 months 18 days
Acquired software and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets			6 years 8 months 12 days
Acquired software and core technology | Included as cost of product revenue
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expenses	837,000	1,000,000	2,500,000	3,900,000
Other acquired intangible assets | Included as operating expense
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expenses	891,000	906,000	2,700,000	2,200,000
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of acquired intangible assets			13 years 3 months 18 days
Unified Service Delivery
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	200,800,000		200,800,000		199,500,000
Test Automation
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,400,000		$ 2,400,000		$ 3,000,000