Income Taxes - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jan. 01, 2016	Sep. 27, 2015	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014
Income Tax [Line Items]
Tax rate			34.40%	35.60%
Effective income tax rate with noncontrolling interest			36.30%	38.50%
Uncertain tax positions		$ 2.7	$ 2.7	$ 2.8	$ 2.9
Uncertain tax positions that would affect tax rate		2.7	$ 2.7	$ 2.8	$ 2.9
Time period that uncertain tax positions not expected to materially change			12 months
Decrease in income tax expense		1.1
Decrease in corporate income tax expense due to state tax rate change		1.2
Reduction of liability for uncertain tax positions		$ 0.6
Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member]
Income Tax [Line Items]
Tax year open for examination			2012
Earliest Tax Year [Member] | State Tax Legislation [Member]
Income Tax [Line Items]
Tax year open for examination			1998
State [Member]
Income Tax [Line Items]
State tax rate		5.00%
State [Member] | Scenario Forecast [Member]
Income Tax [Line Items]
State tax rate	4.00%