Stockholders' Equity (Details Textual) (USD $)	12 Months Ended						0 Months Ended		12 Months Ended			0 Months Ended		12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013 Employee Stock Purchase Plan [Member]	Dec. 29, 2012 Employee Stock Purchase Plan [Member]	Dec. 31, 2011 Employee Stock Purchase Plan [Member]	Jun. 30, 2012 November 29, 2010 Program [Member]	Nov. 29, 2010 November 29, 2010 Program [Member]	Dec. 29, 2012 November 29, 2010 Program [Member]	Dec. 31, 2011 November 29, 2010 Program [Member]	Jan. 01, 2011 November 29, 2010 Program [Member]	Feb. 22, 2013 May 29, 2012 Program [Member]	May 29, 2012 May 29, 2012 Program [Member]	Dec. 28, 2013 May 29, 2012 Program [Member]	Dec. 29, 2012 May 29, 2012 Program [Member]
Preferred and Common Stock and Stock Repurchases
Shares of common stock	47,000,000	47,000,000
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Shares of preferred stock	3,000,000	3,000,000
Preferred stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Maximum amount of common stock approved to repurchase, Value								$ 10,000,000				$ 5,000,000	$ 20,000,000
Common stock repurchased and retired during period, value	5,000,000	8,504,000	4,257,000						4,900,000	4,300,000	800,000
Common stock repurchased and retired, shares	332,771	587,766					667,406								250,400
Weighted average repurchase price of common stock (in dollars per share)	$ 15.03	$ 14.47					$ 14.97								$ 14.15
Remaining authorized repurchase amount														$ 16,500,000
Employee Stock Purchase Plan [Abstract]
Maximum percentage of salary withholdings				10.00%
Purchase price of common stock, percent				85.00%
Shares remaining for issuance				600,000
Shares issued				128.165	65,355	112,491
Weighted average price of shares issued (in dollars per share)				$ 12.38	$ 15.36	$ 12.92