Basis of Presentation - Additional Information (Detail)	3 Months Ended				9 Months Ended		12 Months Ended	4 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 07, 2012	Jun. 15, 2012	Mar. 23, 2012	Sep. 07, 2012	Sep. 30, 2013	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	Dec. 31, 2013 Scenario, Forecast
Significant Accounting Policies [Line Items]
Duration of fiscal period	92 days	84 days	84 days	84 days	252 days	276 days	364 days	112 days	364 days	119 days	371 days		368 days
Change in length of period from corresponding year-earlier period (increase in all periods except for fourth quarter)	8 days					24 days						20 days	4 days