Equity and Stock Based Compensation Plans (Details 4) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 29, 2012	$ 1,272
Other comprehensive income	(1,982)
Balance as of June 29, 2013	(710)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 29, 2012	(179)
Other comprehensive income	0
Balance as of June 29, 2013	(179)
Foreign currency translations [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 29, 2012	1,453
Other comprehensive income	(1,979)
Balance as of June 29, 2013	(526)
Unrealized gains (losses) on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 29, 2012	(2)
Other comprehensive income	(3)
Balance as of June 29, 2013	$ (5)