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Reconciliation of Shares Used to Calculate Basic and Diluted Net Income Per Share (Detail) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares used in basic per share computation	13,598	13,694	13,638	13,796
Shares used in diluted per share computation	13,993	14,196	14,047	14,317
Restricted Stock Units (RSUs)
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive stock outstanding	312	352	331	363
Employee Stock Option
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive stock outstanding	83	150	78	158

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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