Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Reconciliation Of Unrecognized Tax Benefits [Line Items]
Balance at beginning of year	$ 5,381	$ 5,069	$ 4,886
Gross additions for tax positions of current year	776	1,455	578
Gross additions (reductions) for tax positions of prior years	195	126	(23)
Reductions as a result of a lapse of the statute of limitations	(272)	(1,269)	(372)
Balance at end of year	$ 6,080	$ 5,381	$ 5,069