Number of Restricted Stock Unit Awards Outstanding (Detail) (Restricted Stock, USD $)	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding, awards balance:	542,334	[1]	555,382	[1]	534,237	[1]
Number of shares outstanding, awards granted:	235,506	[1]	249,997	[1]	265,894	[1]
Number of shares outstanding, awards vested:	(235,912)	[1]	(260,064)	[1]	(241,916)	[1]
Number of shares outstanding, awards cancelled:	(5,321)	[1]	(2,981)	[1]	(2,833)	[1]
Number of shares outstanding, awards balance:	536,607	[1]	542,334	[1]	555,382	[1]
Weighted-average fair value awards balance	$ 30.32	[1]	$ 25.64	[1]	$ 23.00	[1]
Weighted-average fair value awards granted	$ 48.04	[1]	$ 38.59	[1]	$ 28.78	[1]
Weighted-average fair value awards vested	$ 39.69	[1]	$ 28.29	[1]	$ 23.26	[1]
Weighted-average fair value awards cancelled	$ 32.69	[1]	$ 29.58	[1]	$ 26.73	[1]
Weighted-average fair value awards balance	$ 33.95	[1]	$ 30.32	[1]	$ 25.64	[1]

[1] Does not include employee stock purchase or stock option plans.