A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended			1 Months Ended		3 Months Ended
	Mar. 30, 2013	Dec. 29, 2012	Dec. 28, 2013 Subsequent Event	Mar. 30, 2013 State and Local Jurisdiction	Mar. 30, 2013 State and Local Jurisdiction Minimum	Mar. 30, 2013 State and Local Jurisdiction Maximum	Oct. 31, 2011 IRS	Sep. 30, 2011 IRS	Mar. 30, 2013 IRS
Income Taxes [Line Items]
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
Decrease in unrecognized tax benefit									$ 0.5
Income tax return examination status									As of March 30, 2013, the examination has been effectively settled
Income tax return examination period					3 years	4 years
Unrecognized tax benefits	0.8	1.3
Accrued interest and penalties	$ 0.3	$ 0.7
Effective income tax rate	27.70%
Expected tax provision rate			37.00%