Business Combinations - Summary of Allocation of the Preliminary Purchase Price (Parenthetical) (Detail)	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended
Apr. 29, 2011 Existing technology	Apr. 29, 2011 Customer relationships	Dec. 31, 2012 Minimum	Apr. 29, 2011 Minimum Trademarks	Dec. 31, 2012 Maximum	Apr. 29, 2011 Maximum Trademarks
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Estimated useful lives of intangibles	13 years	11 years	1 year	1 year	15 years	15 years

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration