Share Based Compensation - Schedule of Stock Option Outstanding (Detail) (CAD) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Line Items]
Options Outstanding ,Weighted Average Exercise Price	8.29
Outstanding options, Number Exercisable	830
Options Exercisable, Weighted Average Exercise Price	9.49
Options Exercisable, Number Exercisable	125
Options Outstanding ,Remaining Contractual Life	7 years 7 months 6 days
Range I [Member]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Line Items]
Outstanding options, Exercise price	3.50
Options Outstanding ,Weighted Average Exercise Price	3.50
Outstanding options, Number Exercisable	75
Options Exercisable, Weighted Average Exercise Price	3.50
Options Exercisable, Number Exercisable	75
Options Outstanding ,Remaining Contractual Life	1 year 7 months 6 days
Range II [Member]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Line Items]
Outstanding options, Exercise price	6.47
Options Outstanding ,Weighted Average Exercise Price	6.47
Outstanding options, Number Exercisable	313
Options Exercisable, Weighted Average Exercise Price
Options Exercisable, Number Exercisable
Options Outstanding ,Remaining Contractual Life	8 years 2 months 12 days
Range III [Member]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Line Items]
Outstanding options, Exercise price	9.36
Options Outstanding ,Weighted Average Exercise Price	9.36
Outstanding options, Number Exercisable	392
Options Exercisable, Weighted Average Exercise Price
Options Exercisable, Number Exercisable
Options Outstanding ,Remaining Contractual Life	9 years 3 months 18 days
Range IV [Member]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Line Items]
Outstanding options, Exercise price	18.48
Options Outstanding ,Weighted Average Exercise Price	18.48
Outstanding options, Number Exercisable	50
Options Exercisable, Weighted Average Exercise Price	18.48
Options Exercisable, Number Exercisable	50
Options Outstanding ,Remaining Contractual Life	3 months 18 days