Components of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 28, 2013	$ 612
Other comprehensive income	393
Balance at June 28, 2014	1,005
Defined Benefit Pension Plans [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 28, 2013	(28)
Other comprehensive income	0
Balance at June 28, 2014	(28)
Foreign Currency Translations [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 28, 2013	631
Other comprehensive income	385
Balance at June 28, 2014	1,016
Unrealized Gain on Investment [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 28, 2013	9
Other comprehensive income	8
Balance at June 28, 2014	$ 17