Capital Stock - Summary of Stock Option Activity (Detail) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Shares	274,000	692,800	990,900
Granted, Shares		20,000
Granted, Weighted Average Price		$ 22.71
Exercised, Shares	(96,500)	(438,800)	(298,100)
Cancelled, Shares	(36,000)
Ending Balance, Shares	141,500	274,000	692,800
Beginning Balance, Weighted Average Price	$ 8.62	$ 5.46	$ 4.54
Options Exercisable, Shares	131,500
Exercised, Weighted Average Price	$ 7.21	$ 4.27	$ 2.41
Cancelled, Weighted Average Price	$ 16.98
Ending Balance, Weighted Average Price	$ 7.13	$ 8.62	$ 5.46
Options Exercisable, Option Price per Share	$ 7.09
Balance, Weighted Average Remaining Terms (years)	3 years 10 months 24 days
Options Exercisable, Weighted Average Remaining Terms (years)	3 years 8 months 12 days
Aggregate Intrinsic Value	$ 6,786,000
Options Exercisable, Aggregate Intrinsic Value	$ 6,313,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Price per Share, Granted		$ 0.00
Beginning Balance, Option Price per Share	$ 2.54	$ 2.00	$ 0.47
Option Price per Share, Exercised	$ 2.54	$ 2.00	$ 0.47
Option Price per Share, Cancelled	$ 7.74
Ending Balance, Option Price per Share	$ 5.05	$ 2.54	$ 2.00
Options Exercisable, Option Price per Share	$ 5.05
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Price per Share, Granted		$ 22.71
Beginning Balance, Option Price per Share	$ 22.71	$ 19.37	$ 19.37
Option Price per Share, Exercised	$ 22.71	$ 7.74	$ 7.74
Option Price per Share, Cancelled	$ 22.71
Ending Balance, Option Price per Share	$ 19.37	$ 22.71	$ 19.37
Options Exercisable, Option Price per Share	$ 19.37