Summary Of Effect Of Derivative Instruments On Consolidated Statement Of Comprehensive Income (Detail) (CAD) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Apr. 01, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of net (gain) loss reclassified to earnings	663		(1,148)
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	2,772	[1],[2]	(3,502)	[1],[2]
Amount of gain (loss) recognized in OCI, Income tax effect	(862)	[1],[2]	987	[1],[2]
Amount of gain (loss) recognized in OCI, Net of income taxes	1,910	[1],[2]	(2,515)	[1],[2]
Amount of net (gain) loss reclassified to earnings	663	[1]	(1,148)	[1]
Amount of net (gain) loss reclassified to earnings, Income tax effect	(130)	[1]	298	[1]
Amount of net (gain) loss reclassified to earnings, Net of income taxes	533	[1]	(850)	[1]
Total effect on OCI	3,435	[1],[2]	(4,650)	[1],[2]
Total effect on OCI, Net of income taxes	2,443	[1],[2]	(3,365)	[1],[2]
Cash Flow Hedging | Income Taxes
Derivative Instruments, Gain (Loss) [Line Items]
Total effect on OCI, Income tax effect	(992)	[1],[2]	1,285	[1],[2]
Cash Flow Hedging | Forward Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	3,273	[1],[2]	(3,502)	[1],[2]
Amount of net (gain) loss reclassified to earnings	471	[1]	(1,321)	[1]
Cash Flow Hedging | Forward Currency Contracts | Cost Of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Total effect on OCI	3,744	[1],[2]	(4,823)	[1],[2]
Cash Flow Hedging | Interest Rate Swap | Ad Fund
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	(501)	[1],[2]	0	[1],[2]
Amount of net (gain) loss reclassified to earnings	19	[1]	0	[1]
Cash Flow Hedging | Interest Rate Swap | Interest (Expense) | Ad Fund
Derivative Instruments, Gain (Loss) [Line Items]
Total effect on OCI	(482)	[1],[2]	0	[1],[2]
Cash Flow Hedging | Interest Rate Forwards
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	0	[1],[2],[3]	0	[1],[2],[3]
Amount of net (gain) loss reclassified to earnings	173	[1],[3]	173	[1],[3]
Cash Flow Hedging | Interest Rate Forwards | Interest (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Total effect on OCI	173	[1],[2],[3]	173	[1],[2],[3]

[1] Excludes amounts related to ineffectiveness, as they were not significant.

[2] Other comprehensive income ("OCI").

[3] The Company entered into and settled interest rate forwards in fiscal 2010 relating to the Company's outstanding term debt.