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Stock Option Activity (Detail) - Stock Option shares in Thousands	12 Months Ended
	Dec. 29, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding at beginning of year | shares	73
Options, Exercised | shares	(73)
Weighted Average Exercise Price, Outstanding at beginning of year | $ / shares	$ 10.87
Weighted Average Exercise Price, Exercised | $ / shares	$ 10.87

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

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