Common Stock (Details 2) (USD $)	0 Months Ended				12 Months Ended			0 Months Ended
	Aug. 10, 2012	Feb. 22, 2012	Aug. 30, 2011	Jul. 06, 2010	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Feb. 13, 2014 Common Stock Subsequent event Maximum
Share repurchase program
Share repurchase program, amount authorized to be repurchased	$ 5,000,000	$ 4,450,000	$ 7,500,000	$ 5,000,000				$ 15,000,000
Options exercised (in shares)
Exercise of stock options (in shares)					13,389	47,185	47,009
Proceeds from exercise of options					200,000	600,000	600,000
Tax Deficit on Stock Option Exercises and Restricted Share Vesting
Tax deficits on stock options exercises and restricted share vestings					$ 254,000	$ 576,000	$ 639,000