Equity and Stock Based Compensation Plans (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 28, 2013	Dec. 29, 2012
Options, Outstanding [Roll Forward]
Number of Shares Outstanding (Options), Beginning Balance	2,020,319
Number of Shares Outstanding (Options), Exercised	(218,474)
Number of Shares Outstanding (Options), Granted	374,700
Number of Shares Outstanding (Options), Cancelled	(121,881)
Number of Shares Outstanding (Options), Ending Balance	2,054,664	2,020,319
Number of Shares Outstanding (Options), Exercisable at September 28, 2013	1,258,894
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance	$ 12.01
Weighted Average Exercise Price, Exercised	$ 7.46
Weighted Average Exercise Price, Granted	$ 15.22
Weighted Average Exercise Price, Cancelled	$ 15.10
Weighted Average Exercise Price, Ending Balance	$ 12.90	$ 12.01
Weighted Average Exercise Price, Exercisable at September 28, 2013	$ 11.43
Weighed Average Remaining Contractual Term, Opening	4 years 3 months 10 days	4 years 5 months 9 days
Weighed Average Remaining Contractual Term, Closing	4 years 3 months 10 days	4 years 5 months 9 days
Weighed Average Remaining Contractual Term, Exercisable at September 28, 2013	3 years 5 months 26 days
Aggregate Intrinsic Value, Opening	$ 6,770
Aggregate Intrinsic Value, Closing	7,158	6,770
Aggregate Intrinsic Value, Exercisable at September 28, 2013	$ 6,150