Stock Compensation Plans and Stock Based Compensation (Details 3) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 29, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding beginning balance \| shares	5,783
Granted \| shares	736
Exercised \| shares	(993)
Canceled and forfeited \| shares	(112)
Options outstanding ending balance \| shares	5,414
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Options outstanding beginning balance \| $ / shares	$ 16.56
Weighted-Average Exercise Price Granted \| $ / shares	39.57
Weighted-Average Exercise Price Exercised \| $ / shares	11.84
Weighted-Average Exercise Price Canceled and Forfeited \| $ / shares	18.83
Weighted-Average Exercise Price, Options outstanding ending balance \| $ / shares	$ 20.51
Summary of company stock option plans
Options vested as of December 29, 2018 \| shares	4,029
Weighted Average Exercise Price, Options vested as of December 29, 2018 \| $ / shares	$ 16.68
Weighted-Average Remaining Contractual Term, Options outstanding as of December 29, 2018	3 years 6 months 28 days
Weighted-Average Remaining Contractual Term, Options vested as of December 29, 2018	3 years
Aggregate Intrinsic Value, Options outstanding as of December 29, 2018 \| $	$ 120,215
Aggregate Intrinsic Value, Options vested as of December 29, 2018 \| $	$ 104,852

Summary of company stock option plans.

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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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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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Net 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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

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

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