Total Purchase Consideration and Preliminary Purchase Price Allocation (Detail) (USD $) In Thousands, unless otherwise specified				1 Months Ended
	Apr. 30, 2014	Oct. 31, 2013		Mar. 24, 2014 Coverity Inc
Business Acquisition [Line Items]
Total consideration				$ 375,500
Goodwill	2,254,454	1,975,971	[1]	266,423
Identifiable intangibles assets acquired				101,900
Other tangible assets acquired, net				28,447
Deferred revenue				(21,270)
Total purchase allocation				$ 375,500

[1] Derived from audited financial statements.