Share-Based Compensation - Schedule of Stock Option Outstanding (Detail) (CAD) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower	7.28
Options Outstanding, Number Exercisable	468
Options Outstanding, Remaining Contractual Life (years)	7 years 3 months 18 days
Options Outstanding, Weighted Exercise Price	7.28
Options Exercisable, Number Exercisable	125
Options Exercisable, Weighted Exercise Price	9.49
Range I [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower	3.50
Options Outstanding, Number Exercisable	75
Options Outstanding, Remaining Contractual Life (years)	2 years 7 months 6 days
Options Outstanding, Weighted Exercise Price	3.50
Options Exercisable, Number Exercisable	75
Options Exercisable, Weighted Exercise Price	3.50
Range II [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower	6.47
Options Outstanding, Number Exercisable	343
Options Outstanding, Remaining Contractual Life (years)	9 years 2 months 12 days
Options Outstanding, Weighted Exercise Price	6.47
Options Exercisable, Number Exercisable
Options Exercisable, Weighted Exercise Price
Range III [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower	18.48
Options Outstanding, Number Exercisable	50
Options Outstanding, Remaining Contractual Life (years)	1 year 3 months 18 days
Options Outstanding, Weighted Exercise Price	18.48
Options Exercisable, Number Exercisable	50
Options Exercisable, Weighted Exercise Price	18.48