Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net income	$ 60,081	$ 78,094	$ 60,478
Other comprehensive (loss) income – unrealized (loss) gain on available-for-sale marketable debt securities, net of income tax	(7)	(5)	25
Comprehensive income	$ 60,074	$ 78,089	$ 60,503