Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended	0 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Dec. 29, 2013	Sep. 28, 2014 Internal Revenue Service (IRS) [Member] Earliest Tax Year [Member]	Sep. 28, 2014 State Tax Legislation [Member] Earliest Tax Year [Member]	Sep. 29, 2013 State Tax Legislation [Member]	Sep. 28, 2014 State Tax Legislation [Member]	Dec. 29, 2013 State Tax Legislation [Member]	Jan. 01, 2015 State Tax Legislation [Member] Scenario, Forecast [Member]
Income Tax [Line Items]
Tax rate			35.60%	28.80%					6.00%	6.90%	5.00%
Effective income tax rate with noncontrolling interest			38.50%	31.10%
Uncertain tax positions	$ 2,800,000	$ 2,800,000	$ 2,800,000	$ 2,800,000	$ 2,800,000
Uncertain tax positions that would affect tax rate	2,800,000	2,800,000	2,800,000	2,800,000	2,800,000
Time period that uncertain tax positions not expected to materially change			12 months
Reduction of liability for uncertain tax positions	600,000	3,400,000
Decrease in income tax expense	600,000	900,000
Credit to income tax expense				400,000
Decrease in corporate income tax expense due to state tax rate change			$ 0	$ (2,261,000)				$ (2,261,000)
Tax year open for examination						2011	1997