Share-Based Compensation - Stock Option Activity (Details) - Stock options - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Stock Options (in thousands)
Beginning balance (in shares)	6,493	5,446	5,006
Granted (in shares)	1,054	1,138	1,182
Exercised (in shares)	(252)	(91)	(734)
Forfeited or expired (in shares)	(25)	0	(8)
Ending balance (in shares)	7,270	6,493	5,446	5,006
Exercisable, Ending balance (in shares)	5,146
Vested or expected to vest, Ending balance (in shares)	7,270
Weighted average exercise price
Beginning balance (in USD per share)	$ 12.57	$ 12.30	$ 11.41
Granted (in USD per share)	15.48	13.68	14.67
Exercised (in USD per share)	10.27	10.47	10.04
Forfeited or expired (in USD per share)	11.98	0	10.64
Ending balance (in USD per share)	13.07	$ 12.57	$ 12.30	$ 11.41
Exercisable, Ending balance (in USD per share)	12.38
Vested or expected to vest, Ending balance (USD per share)	$ 13.07
Additional Information
Weighted average contractual term (years)	6 years 6 months	6 years 10 months 24 days	7 years 3 months 18 days	8 years 1 month 6 days
Weighted average contractual term (years), Exercisable	5 years 4 months 24 days
Weighted average contractual term (years), Vested or expected to vest	6 years 6 months
Aggregate intrinsic value (in thousands)	$ 20,659,300	$ 11,045,400	$ 11,993,000.0	$ 26,952,300
Aggregate intrinsic value (in thousands), Exercised	1,185,900	$ 389,100	$ 4,408,100
Aggregate intrinsic value (in thousands), Exercisable	18,572,700
Aggregate intrinsic value (in thousands), Vested or expected to vest	$ 20,659,300

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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 of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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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 fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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