Equity and Stock Based Compensation Plans (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 29, 2013	Dec. 29, 2012
Options, Outstanding [Roll Forward]
Number of Shares Outstanding (Options), Beginning Balance	2,020,319
Number of Shares Outstanding (Options), Exercised	(181,617)
Number of Shares Outstanding (Options), Granted	314,100
Number of Shares Outstanding (Options), Cancelled	(67,037)
Number of Shares Outstanding (Options), Ending Balance	2,085,765	2,020,319
Number of Shares Outstanding (Options), Exercisable at June 29, 2013	1,234,828
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance	$ 12.01
Weighted Average Exercise Price, Exercised	$ 7.15
Weighted Average Exercise Price, Granted	$ 15.31
Weighted Average Exercise Price, Cancelled	$ 14.63
Weighted Average Exercise Price, Ending Balance	$ 12.85	$ 12.01
Weighted Average Exercise Price, Exercisable at June 29, 2013	$ 11.25
Weighed Average Remaining Contractual Term, Opening	4 years 4 months 6 days	4 years 5 months 9 days
Weighed Average Remaining Contractual Term, Closing	4 years 4 months 6 days	4 years 5 months 9 days
Weighed Average Remaining Contractual Term, Exercisable at June 29, 2013	3 years 6 months 21 days
Aggregate Intrinsic Value, Opening	$ 6,770
Aggregate Intrinsic Value, Closing	5,757	6,770
Aggregate Intrinsic Value, Exercisable at June 29, 2013	$ 5,127