Accumulated Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ (3,486)
Net change in accumulated other comprehensive loss	100	(901)	373	(1,192)
Ending balance	(3,113)		(3,113)
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			62
Ending balance	(62)		(62)
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			331
Ending balance	(2,271)		(2,271)
Accumulated Tax Effect [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(760)
Net change in accumulated other comprehensive loss			(20)
Ending balance	$ (780)		$ (780)