Options Outstanding (Detail) (USD $)	12 Months Ended
	Jan. 03, 2014		Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding	217,000	[1]	258,128	[1]	435,396	[1]	511,140	[1]
Weighted average remaining contractual term, Balance	5 years 10 months 6 days	[1]
Weighted Average Exercise Price, Outstanding	$ 32.06	[1]	$ 24.21	[1]	$ 17.60	[1]	$ 15.69	[1]
Number of shares outstanding, Exercisable	141,125	[1]
Weighted-average exercise price, Exercisable	$ 26.81	[1]
Range Of Exercise Price $12.42-18.37
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding	32,000
Weighted average remaining contractual term, Balance	2 years 29 days
Weighted Average Exercise Price, Outstanding	$ 16.14
Number of shares outstanding, Exercisable	28,000
Weighted-average exercise price, Exercisable	$ 16.67
Range Of Exercise Price $23.07-31.01
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding	102,500
Weighted average remaining contractual term, Balance	5 years 2 months 19 days
Weighted Average Exercise Price, Outstanding	$ 26.59
Number of shares outstanding, Exercisable	91,875
Weighted-average exercise price, Exercisable	$ 26.67
Range Of Exercise Price $37.72-37.72
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding	30,000
Weighted average remaining contractual term, Balance	7 years 1 month 10 days
Weighted Average Exercise Price, Outstanding	$ 37.72
Number of shares outstanding, Exercisable	15,000
Weighted-average exercise price, Exercisable	$ 37.72
Range Of Exercise Price $48.27-50.03
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding	52,500
Weighted average remaining contractual term, Balance	8 years 7 months 17 days
Weighted Average Exercise Price, Outstanding	$ 49.19
Number of shares outstanding, Exercisable	6,250
Weighted-average exercise price, Exercisable	$ 48.27

[1] Does not include restricted stock or employee stock purchase plans