Summary of Allocation of Preliminary Purchase Price (Parenthetical) (Detail)	1 Months Ended
	Apr. 29, 2011
Existing technology
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Estimated useful lives of intangibles	13 years
Customer relationships
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Estimated useful lives of intangibles	11 years
Minimum | Trademarks
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Estimated useful lives of intangibles	1 year
Maximum | Trademarks
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Estimated useful lives of intangibles	15 years