Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Dec. 30, 2012
Income Tax Disclosure [Abstract]
Effective income tax rate	37.70%	37.30%	38.10%	38.40%
Unrecognized tax benefits	$ 3.2		$ 3.2		$ 2.9
Unrecognized tax benefits that would decrease effective tax rate and provision for income taxes, if recognized	2.3		2.3
Expected decrease in unrecognized tax benefits within next twelve months	1.6		1.6
Total amount of interest and penalties accrued related to unrecognized tax benefits	$ 2.0		$ 2.0		$ 2.6