Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 78,609	$ 31,104
Other comprehensive loss, net of tax effects:
Foreign currency translation loss	(6,162)	(2,466)
Changes in unrealized holding gains or losses on available-for-sale securities, net of reclassification adjustment for realized gains and losses	(284)	(4)
Changes in defined benefit plan liabilities	318	(29)
Total other comprehensive loss, net of tax effects	(6,128)	(2,499)
Comprehensive income	$ 72,481	$ 28,605