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Stock Options Activity Related to Equity Incentive Plans (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Common Stock Options Outstanding
Common Stock Options, beginning balance	2,238,114	2,498,310	3,323,476
Common Stock Options, granted	96,580	126,720	233,280
Common Stock Options, cancelled	(11,193)	(28,991)	(12,798)
Common Stock Options, exercised	(414,102)	(357,925)	(1,045,648)
Common Stock Options, ending balance	1,909,399	2,238,114	2,498,310
Common Stock Options, Exercisable at end of period	1,698,583
Common Stock Options Weighted Average Exercise Price
Weighted Average Exercise Price, beginning balance	$ 55.94	$ 43.54	$ 28.57
Weighted Average Exercise Price, Stock options granted	266.11	201.19	129.42
Weighted Average Exercise Price, Stock options cancelled	174.63	101.97	104.23
Weighted Average Exercise Price, Stock options exercised	23.74	17.05	14.38
Weighted Average Exercise Price, ending balance	72.86	$ 55.94	$ 43.54
Weighted Average Exercise Price, Exercisable at end of period	$ 56.40
Weighted Average Remaining Life (Years)	4 years 6 months
Weighted Average Remaining Life (Years), Exercisable at end of period	4 years
Stock options, Aggregate Intrinsic Value, ending balance	$ 340,555
Stock options, Aggregate Intrinsic Value, Exercisable at end of period	$ 328,788

X

- Definition

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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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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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 price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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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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