Equity and Stock Based Compensation Plans (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 30, 2013	Dec. 29, 2012
Options
Number of Shares Outstanding (Options), Beginning Balance	2,020,319
Number of Shares Outstanding (Options), Exercised	(105,843)
Number of Shares Outstanding (Options), Granted	254,300
Number of Shares Outstanding (Options), Cancelled	(29,650)
Number of Shares Outstanding (Options), Ending Balance	2,139,126	2,020,319
Number of Shares Outstanding (Options), Exercisable at March 30, 2013	1,205,776
Weighted Average Exercise Price, Beginning Balance	$ 12.01
Weighted Average Exercise Price, Exercised	$ 7.79
Weighted Average Exercise Price, Granted	$ 15.52
Weighted Average Exercise Price, Cancelled	$ 13.45
Weighted Average Exercise Price, Ending Balance	$ 12.62	$ 12.01
Weighted Average Exercise Price, Exercisable at March 30, 2013	$ 10.65
Weighed Average Remaining Contractual Term, Opening	4 years 5 months 5 days	4 years 5 months 9 days
Weighed Average Remaining Contractual Term, Closing	4 years 5 months 5 days	4 years 5 months 9 days
Weighed Average Remaining Contractual Term, Exercisable at March 30, 2013	3 years 6 months 18 days
Aggregate Intrinsic Value, Opening	$ 6,770
Aggregate Intrinsic Value, Closing	6,142	6,770
Aggregate Intrinsic Value, Exercisable at March 30, 2013	$ 5,438