ACQUISITIONS - Allocation of Purchase Price (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013	Oct. 31, 2012 Onpath	Jul. 20, 2012 Accanto Systems Srl
Allocation of the purchase consideration:
Current assets, including cash and cash equivalents of $527			$ 8,356	$ 389
Cash and cash equivalents			527
Fixed assets			784	237
Identifiable intangible assets			10,970	5,280
Goodwill	202,863	202,453	19,897	11,157
Deferred tax asset			7,329
Other assets			1,432
Total assets acquired			48,768	17,063
Current liabilities			(6,387)	(839)
Deferred revenue			(921)	(240)
Deferred income tax liabilities			(4,660)	(984)
Net assets acquired			$ 36,800	$ 15,000