Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Dec. 28, 2014
Income Tax [Line Items]
Tax rate	37.40%	36.00%
Effective income tax rate with noncontrolling interest	39.50%	39.00%
Uncertain tax positions	$ 3.2	$ 3.2	$ 2.9
Uncertain tax positions that would affect tax rate	$ 3.2	$ 3.2	$ 2.9
Time period that uncertain tax positions not expected to materially change	12 months
Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Income Tax [Line Items]
Tax year open for examination	2011
Earliest Tax Year [Member] | State Tax Legislation [Member]
Income Tax [Line Items]
Tax year open for examination	1997