Reconciliation of Shares Used to Calculate Basic and Diluted Net Income Per Share (Detail) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2014	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Jan. 03, 2014	Dec. 28, 2012	Dec. 30, 2011
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares used in basic per share computation	13,556	13,598	13,637	13,667	13,733	13,694	13,835	13,859	13,616	13,780	14,181
Shares used in diluted per share computation	13,949	13,993	14,007	14,125	14,208	14,196	14,316	14,419	14,025	14,293	14,751
Restricted Stock Units (RSUs)
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive stock outstanding									327	363	386
Employee Stock Option
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive stock outstanding									82	150	184