Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 9,429	$ 36,386	$ 88,038	$ 67,490
Other comprehensive loss, net of tax effects:
Foreign currency translation loss	(11,705)	(2,366)	(17,867)	(4,832)
Changes in unrealized holding gains or losses on available-for-sale securities, net of reclassification adjustment for realized gains and losses	(99)	(1,017)	(383)	(1,021)
Changes in defined benefit plan liabilities	65	84	383	54
Total other comprehensive loss, net of tax effects	(11,739)	(3,299)	(17,867)	(5,799)
Comprehensive income (loss)	$ (2,310)	$ 33,087	$ 70,171	$ 61,691