Basis of Presentation - Additional Information (Detail)	3 Months Ended				12 Months Ended	4 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended	3 Months Ended			12 Months Ended
	Mar. 31, 2013	Sep. 07, 2012	Jun. 15, 2012	Mar. 23, 2012	Dec. 28, 2012	Dec. 28, 2012 Lower Limit	Dec. 28, 2012 Lower Limit	Dec. 28, 2012 Upper Limit	Dec. 28, 2012 Upper Limit	Dec. 31, 2013 Scenario, Forecast	Sep. 30, 2013 Scenario, Forecast	Jun. 30, 2013 Scenario, Forecast	Dec. 31, 2013 Scenario, Forecast
Significant Accounting Policies [Line Items]
Duration of fiscal period (values for 2012 apply to all periods before 2013)		P12W	P12W	P12W		P16W	P52W	P17W	P53W
Change in length of period from corresponding year-earlier period (increase in all periods except for fourth quarter)	9 days									20 days	8 days	7 days	4 days
Duration of fiscal period	93 days			84 days	364 days								368 days