Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Net income	$ 32,695	$ 27,521	$ 22,127
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net of tax	(72)	(53)	(122)
Unrealized gain (loss) arising during the period on investments, net of tax	52	(31)	100
Comprehensive income	$ 32,675	$ 27,437	$ 22,105