Performance Contingent TSR Shares (Detail) (Grant Date Sixteen July Two Thousand And Twelve, Total Shareholders Return, USD $)	12 Months Ended
	Dec. 29, 2012
Grant Date Sixteen July Two Thousand And Twelve | Total Shareholders Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	137,500
Vesting date	Feb. 28, 2014
Fair value per share	$ 23.18