Consolidated Statements of Comprehensive Income (Unaudited, Current Period Restated) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Net income	$ 11,488	$ 17,563
Other comprehensive income (loss):
Pension liability adjustments (net of tax of $103 and $45, respectively)	(194)	(66)
Unrealized gain on investments	1,618	1,812
Foreign currency translation adjustments	(5,250)	7,396
Comprehensive income	$ 7,662	$ 26,705