Equity and Stock Based Compensation Plans (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 28, 2014	Dec. 28, 2013
Options, Outstanding [Roll Forward]
Number of Shares Outstanding (Options), Beginning Balance	1,909,039
Number of Shares Outstanding (Options), Exercised	(327,466)
Number of Shares Outstanding (Options), Granted	74,300
Number of Shares Outstanding (Options), Cancelled	(70,688)
Number of Shares Outstanding (Options), Ending Balance	1,585,185	1,909,039
Number of Shares Outstanding (Options), Exercisable	1,028,377
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance (in dollars per share)	$ 13.22
Weighted Average Exercise Price, Exercised (in dollars per share)	$ 10.39
Weighted Average Exercise Price, Granted (in dollars per share)	$ 17.56
Weighted Average Exercise Price, Cancelled (in dollars per share)	$ 15.42
Weighted Average Exercise Price, Ending Balance (in dollars per share)	$ 13.91	$ 13.22
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 12.73
Weighed Average Remaining Contractual Term (Years), Opening	3 years 11 months 16 days	4 years 0 months 7 days
Weighed Average Remaining Contractual Term (Years), Closing	3 years 11 months 16 days	4 years 0 months 7 days
Weighed Average Remaining Contractual Term (Years), Exercisable	3 years 2 months 1 day
Aggregate Intrinsic Value, Opening	$ 10,341
Aggregate Intrinsic Value, Closing	7,139	10,341
Aggregate Intrinsic Value, Exercisable	$ 5,840