Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended						1 Months Ended		12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010	Dec. 29, 2012 State and Local Jurisdiction	Dec. 29, 2012 State and Local Jurisdiction Minimum	Dec. 29, 2012 State and Local Jurisdiction Maximum	Oct. 31, 2011 IRS	Sep. 30, 2011 IRS	Dec. 29, 2012 IRS
Income Taxes [Line Items]
Interest and penalties included in provision for incomes taxes	$ 0.1	$ 0.4	$ 0.7
Accrued interest and penalties	0.7	1.0
Unrecognized tax benefits that would impact the effective tax rate if recognized	$ 1.1	$ 1.6
Income tax return examination				The Company's state income tax returns remain subject to examination for three or four years depending on the state's statute of limitations.			Expanded the original examination to include the 2009 corporate income tax return	Examination of the Company's 2007 and 2008 amended consolidated corporate income tax returns and the related loss carry back claim to 2006.
Income tax return examination period					3 years	4 years
Income tax return examination status									The examination was in progress as of December 29, 2012