Pro Forma Consolidated Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012	Oct. 08, 2011
Acquisition [Abstract]
Sales, As reported	$ 717,282	$ 675,369	$ 2,297,049	$ 2,119,790
Sales, Pro forma		718,891	2,396,569	2,341,667
Net income, As reported	31,231	31,019	97,554	100,390
Net income, Pro forma		$ 35,545	$ 97,503	$ 104,984
Basic net income per common share, As reported	$ 0.23	$ 0.23	$ 0.72	$ 0.74
Basic net income per common share, Pro forma		$ 0.26	$ 0.71	$ 0.76
Diluted net income per common share, As reported	$ 0.22	$ 0.23	$ 0.71	$ 0.73
Diluted net income per common share, Pro forma		$ 0.26	$ 0.70	$ 0.76