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Summary of Option Activity Under Stock Plans, Inducement Option and Winfrey Option (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2018 USD ($) $ / shares shares
Shares
Beginning Balance | shares	5,884,000
Granted | shares	0
Exercised | shares	(2,037,000)
Cancelled | shares	(58,000)
Ending Balance | shares	3,789,000
Exercisable at December 29, 2018 | shares	2,790,000
Weighted-Average Exercise Price
Beginning Balance | $ / shares	$ 18.17
Granted | $ / shares	0.00
Exercised | $ / shares	11.89
Cancelled | $ / shares	9.21
Ending Balance | $ / shares	21.69
Exercisable at December 29, 2018 | $ / shares	$ 13.27
Weighted-Average Remaining Contractual Life, Outstanding at December 29, 2018	6 years 2 months 12 days
Weighted-Average Remaining Contractual Life, Exercisable at December 29, 2018	6 years 6 months
Aggregate Intrinsic Value, Outstanding at December 29, 2018 | $	$ 84,871
Aggregate Intrinsic Value, Exercisable at December 29, 2018 | $	$ 81,774

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

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