v2.4.0.8

Capital stock (Employee director stock options outstanding) (Details) (USD $)				12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013 2013	Dec. 28, 2013 2013 Minimum [Member]	Dec. 28, 2013 2013 Maximum [Member]	Dec. 28, 2013 2014	Dec. 28, 2013 2014 Minimum [Member]	Dec. 28, 2013 2014 Maximum [Member]	Dec. 28, 2013 2015	Dec. 28, 2013 2015 Minimum [Member]	Dec. 28, 2013 2015 Maximum [Member]	Dec. 28, 2013 2016	Dec. 28, 2013 2016 Minimum [Member]	Dec. 28, 2013 2016 Maximum [Member]	Dec. 28, 2013 2017	Dec. 28, 2013 2017 Minimum [Member]	Dec. 28, 2013 2017 Maximum [Member]	Dec. 28, 2013 2022	Dec. 28, 2013 2022 Minimum [Member]	Dec. 28, 2013 2022 Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit				$ 4.06			$ 0.91			$ 4.45			$ 4.88			$ 5.14			$ 7.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit					$ 13.35			$ 1.92			$ 5.62			$ 7.72			$ 5.73			$ 8.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number			170,500			277,080			211,300			266,800			194,000			0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 4.80		$ 5.69			$ 1.64			$ 4.50			$ 7.11			$ 5.66
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	4,024,460	3,687,500	170,500			402,860			403,300			725,200			1,269,600			1,053,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 5.85	$ 5.46	$ 5.69			$ 1.64			$ 4.50			$ 7.12			$ 5.57			$ 7.45

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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