Share-Based Compensation - Stock Option Activity (Detail) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jan. 01, 2011 USD ($)	Jan. 02, 2010 USD ($)	Jan. 02, 2010 CAD	Dec. 29, 2012 CAD	Dec. 31, 2011 CAD	Jan. 01, 2011 CAD
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Shares	284	704	831
Options exercised, Shares	0	(275)	0
Options exercised, Weighted average exercise price		$ 1.32
Stock options granted, shares	385		250
Options forfeited or expired, Shares	(201)	(145)	(377)
Ending balance, Shares	468	284	704	831	831
Beginning balance, Weighted average exercise price	$ 20.47	$ 16.67	$ 18.97			7.28	20.47	16.67
Vested at December 29, 2012, Shares	125
Stock options granted, Weighted average exercise price	$ 6.47		$ 8.01
Exercisable at December 29, 2012, Shares	125
Options forfeited or expired, Weighted average exercise price	$ 24.40	$ 38.27	$ 20.33
Ending balance, Weighted average exercise price	$ 7.28	$ 20.47	$ 16.67	$ 18.97		7.28	20.47	16.67
Beginning balance, Aggregate intrinsic value						819,900	263,000	625,000
Vested at December 29, 2012, Weighted average exercise price	$ 9.49
Ending balance, Aggregate intrinsic value					618,100	819,900	263,000	625,000
Exercisable at December 29, 2012, Weighted average exercise price	$ 9.49
Vested at December 29, 2012, Aggregate intrinsic value						330,000
Beginning balance, Weighted average remaining contractual term (years)	7 years 3 months 18 days	1 year 8 months 12 days	4 years 2 months 12 days	4 years 7 months 6 days	4 years 7 months 6 days
Exercisable at December 29, 2012, Aggregate intrinsic value						330,000
Vested at December 29, 2012, Weighted average remaining contractual term (years)	2 years 1 month 6 days
Exercisable at December 29, 2012, Weighted average remaining contractual term (years)	2 years 1 month 6 days