CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Net income	$ 15,583	$ 14,282
Other comprehensive income, net of tax:
Net unrealized gain on available-for-sale investments, net of tax of $42 and $291 in 2013 and 2012, respectively	173	1,314
Foreign currency translation adjustments, net of tax of ($227) and $206 in 2013 and 2012, respectively	(2,494)	5,326
Other comprehensive income (loss)	(2,321)	6,640
Comprehensive income	$ 13,262	$ 20,922