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Stock Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended						12 Months Ended										12 Months Ended
	Jan. 03, 2014	Dec. 28, 2012	Dec. 30, 2011	Jan. 03, 2014 Employee Stock Purchase Plan	Dec. 28, 2012 Employee Stock Purchase Plan	Dec. 30, 2011 Employee Stock Purchase Plan	Jan. 03, 2014 Vested Restricted Stock	Dec. 28, 2012 Vested Restricted Stock	Dec. 30, 2011 Vested Restricted Stock	Jan. 03, 2014 Unvested Restricted Stock	Jan. 03, 2014 Unvested Restricted Stock	Dec. 28, 2012 Unvested Restricted Stock	Dec. 30, 2011 Unvested Restricted Stock	Jan. 03, 2014 Employee Stock Option	Jan. 03, 2014 2008 Equity Incentive Plan	May 29, 2008 2008 Equity Incentive Plan	Jan. 03, 2014 Stock Options Granted Prior To December 2005 [Member]	Dec. 28, 2012 Stock Options Granted Prior To December 2005 [Member]	Dec. 30, 2011 Stock Options Granted Prior To December 2005 [Member]	Jan. 03, 2014 Stock Options Granted After December 2005 [Member]	Dec. 28, 2012 Stock Options Granted After December 2005 [Member]	Dec. 30, 2011 Stock Options Granted After December 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense							$ 6,061,000	$ 6,089,000	$ 5,295,000	$ 6,030,000		$ 5,650,000	$ 4,464,000				$ 48,000	$ 37,000	$ 34,000	$ 1,029,000	$ 602,000	$ 547,000
Percentage of annual bonus settled with fully vested restricted stock unit awards							40.00%
Recipient age to expense award on grant date							59 years 6 months
Number of Shares Available for Grant				62,579											925,926
Maximum Percentage Of Payroll Deductions Related To Purchase Of Common Stock				15.00%
Purchase price of Common Stock as Percentage of Fair Market Value				95.00%
Total number of shares reserved for issuance				200,000												2,414,075
Weighted average purchase price				$ 60.64	$ 50.26	$ 41.70
Total instrinsic value of options excercised	3,177,000	7,484,000	2,995,000
Weighted average fair value of options granted	$ 18.78	$ 19.51	$ 16.51
Unrecognized compensation cost										$ 5,233,000	$ 5,233,000			$ 486,000
Weighted average period of recognized term											2 years 4 months 24 days			1 year 9 months 18 days

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Percentage of Annual Bonus Settled With Vested Restricted Stock Unit Awards

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Percentage of fair market value that shares of common stock are purchased at under the ESPP plan.

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Percentage refers to the purchase of common stock through payroll deductions of up to which of a participants (officers and employees) eligible compensation.

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Share-Based Awards, Recipient Retirement Age

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Weighted average price of shares purchased under employee stock purchase plan.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-Publisher FASB

-Name Accounting Standards Codification

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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