Share Based Compensation - Additional Information (Detail) In Millions, except Share data, unless otherwise specified	12 Months Ended							0 Months Ended						12 Months Ended
	Dec. 28, 2013 USD ($)	Dec. 28, 2013 CAD	Dec. 29, 2012 USD ($)	Dec. 29, 2012 CAD	Dec. 31, 2011 USD ($)	Jan. 29, 2012 CAD	Dec. 31, 2011 CAD	May 02, 2013 2010 Equity Incentive Plan [Member] USD ($)	May 06, 2012 2010 Equity Incentive Plan [Member] USD ($)	May 03, 2012 2010 Equity Incentive Plan [Member] USD ($)	Dec. 28, 2013 2010 Equity Incentive Plan [Member]	Feb. 14, 2013 2010 Equity Incentive Plan [Member] USD ($)	May 04, 2010 2010 Equity Incentive Plan [Member]	Dec. 28, 2013 Stock Option Plan [Member] Certain Employees [Member] USD ($)	Dec. 28, 2013 Stock Option Plan [Member] Certain Employees [Member] CAD	Dec. 29, 2012 Stock Option Plan [Member] Certain Employees [Member] USD ($)	Dec. 29, 2012 Stock Option Plan [Member] Certain Employees [Member] CAD	Dec. 31, 2011 Stock Option Plan [Member] Certain Employees [Member]	Dec. 28, 2013 Performance-Based RSUs [Member] USD ($)	Dec. 29, 2012 Performance-Based RSUs [Member] USD ($)	Dec. 31, 2011 Performance-Based RSUs [Member] USD ($)	Dec. 31, 2010 Performance-Based RSUs [Member] USD ($)	Dec. 28, 2013 Time-Based RSUs [Member] USD ($)	Dec. 29, 2012 Time-Based RSUs [Member] USD ($)	Dec. 31, 2011 Time-Based RSUs [Member] USD ($)	Dec. 28, 2013 Stock Options [Member] USD ($)	Dec. 29, 2012 Stock Options [Member] USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 4.0		$ 4.9		$ 2.9			$ 0.8	$ 0.7	$ 0.7									$ 0.2	$ 0.7	$ (1.2)	$ 3.3	$ 2.2	$ 3.1	$ 3.4	$ 0.8	$ 0.4
Maximum number of shares authorized under plan												12,000,000	4,000,000
Number of shares available for issuance for each share issued												$ 2.0
Stock options granted, shares	392,000	392,000	385,000	385,000										392,000	392,000	385,000	385,000	0								392,131	384,546
Options granted, exercise price per share		9.36		6.47										$ 9.29	9.36	$ 6.58	6.47
Options granted, estimated fair value														$ 4.10		$ 4.04
Closing price of common stock		8.65				7.90	6.40
Options exercised, shares	0	0	0	0	275,000
Stock options exercised total intrinsic value					0.4
Compensation cost related to unvested awards	5.6																		0.5				3.4			1.7
Fair value of shares vested
Awarded								87,190	76,110	96,010									247,181	330,969	592,163		382,452	441,996	151,545
Time-based RSUs became vested and issued																							71,204
Shares available for future issuance											7,619,472