Accumulated Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ (3,486)
Net change in accumulated other comprehensive loss	(543)	(54)	(169)	(1,246)
Ending balance	(3,655)		(3,655)
Unrealized Gain on Other Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(124)
Net change in accumulated other comprehensive loss			(27)
Ending balance	(151)		(151)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(2,602)
Net change in accumulated other comprehensive loss			(142)
Ending balance	(2,744)		(2,744)
Accumulated Tax Effect [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(760)
Net change in accumulated other comprehensive loss			0
Ending balance	$ (760)		$ (760)