Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Dec. 30, 2012
Income Tax [Line Items]
Tax rate	35.50%	41.50%
Effective income tax rate	37.80%	44.00%
Uncertain tax positions	$ 5.9	$ 5.1	$ 5.5
Uncertain tax positions that would affect tax rate	3.4	2.6	3.0
Period of Uncertain Tax Position			12 months
Accrued interest related to uncertain tax positions	0.6	0.5	0.5
Interest expense	0.1	0.1
Credit to income tax expense	0.4
Increase in valuation allowance	$ 0.1	$ 0.8
Internal Revenue Service (IRS) [Member] | Minimum [Member]
Income Tax [Line Items]
Tax year open for examination	2009
State Jurisdiction [Member] | Minimum [Member]
Income Tax [Line Items]
Tax year open for examination	1994