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Stock-Based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 29, 2019 USD ($) $ / shares shares
Shares
Options outstanding at beginning of period (in shares) | shares	22,674,062
Granted (in shares) | shares	246,820
Exercised (in shares) | shares	(1,413,766)
Forfeited (in shares) | shares	(44,200)
Expired (in shares) | shares	(22,925)
Options outstanding at end of period (in shares) | shares	21,439,991
Exercisable at end of period (in shares) | shares	15,714,721
Weighted Average Exercise Price Per Share
Options outstanding at beginning of period (in dollars per share) | $ / shares	$ 8.71
Granted (in dollars per share) | $ / shares	22.94
Exercised (in dollars per share) | $ / shares	4.91
Forfeited (in dollars per share) | $ / shares	14.32
Expired (in dollars per share) | $ / shares	22.12
Options outstanding at end of period (in dollars per share) | $ / shares	9.10
Exercisable at end of period (in dollars per share) | $ / shares	$ 6.01
Weighted Average Remaining Contractual Term
Options outstanding at end of period	3 years 7 months 13 days
Exercisable at end of period	2 years 10 months 24 days
Aggregate Intrinsic Value
Options outstanding at end of period | $	$ 317,143
Exercisable at end of period | $	$ 280,307

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term [Abstract]

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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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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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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.

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

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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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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