Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013		Sep. 29, 2012
Net income	$ 26,990	$ 22,778	$ 68,432		$ 63,304
Other comprehensive income (loss):
Pension liability adjustments (net of tax of $49 and ($7) for the three months ended 2013 and 2012, and $233 and $27 for the nine months ended 2013 and 2012, respectively)	(24)	(73)	(349)	[1]	(80)
Unrealized (loss) gain on investments	(532)	(1,127)	546		1,993
Foreign currency translation adjustments	10,273	11,522	(2,998)		9,270
Comprehensive income	$ 36,707	$ 33,100	$ 65,631		$ 74,487

[1] Balances are net of tax of $12,017 and $11,819 for 2013 and 2012, respectively.