CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 73,326	$ 56,163	$ 71,544
Unrealized gain (loss) on investments (net of taxes of $399, $445, $3, for 2013, 2012 and 2011, respectively)	1,677	523	(4)
Foreign currency translation adjustments (net of taxes of $0, $926, $5,526 for 2013, 2012, and 2011, respectively)	889	2,441	(14,004)
Total other comprehensive income (loss)	2,566	2,964	(14,008)
Comprehensive income	$ 75,892	$ 59,127	$ 57,536