Stock-Based Compensation - Summary of Changes in Stock Options Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
Sep. 29, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options outstanding beginning balance at December 31, 2012, Number of Shares	56,042
Granted, Number of Shares	6,636
Exercised, Number of Shares	(6,936)
Canceled, Number of Shares	(4,190)
Options outstanding ending balance at September 29, 2013, Number of Shares	51,552
Options exercisable at September 29, 2013, Number of Shares	34,481
Options outstanding, beginning balance at December 31, 2012, Weighted-Average Exercise Price Per Share	$ 5.75
Granted, Weighted-Average Exercise Price Per Share	$ 6.93
Exercised, Weighted-Average Exercise Price Per Share	$ 3.41
Canceled, Weighted-Average Exercise Price Per Share	$ 8.11
Options outstanding, ending balance at September 29, 2013, Weighted-Average Exercise Price Per Share	$ 6.02
Options exercisable at September 29, 2013, Weighted-Average Exercise Price Per Share	$ 5.81
Options outstanding at September 29, 2013, Weighted-Average Remaining Contractual Term	3 years 5 months 19 days
Options exercisable at September 29, 2013, Weighted-Average Remaining Contractual Term	2 years 5 months 1 day
Options outstanding at September 29, 2013, Aggregate Intrinsic Value	$ 107,013
Options exercisable at September 29, 2013, Aggregate Intrinsic Value	$ 80,237

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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