Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2015	Jun. 27, 2014	Jul. 03, 2015	Jun. 27, 2014	Dec. 31, 2014
Equity [Abstract]
Foreign currency translation adjustments	$ (1,925)		$ (1,925)		$ (1,523)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	456		456		311
Unrealized gain on investments	183		183		(768)
Accumulated Other Comprehensive Loss	(1,286)		(1,286)		$ (1,980)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	582	$ 190	(402)	$ 230
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	516	0	332	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax	460	(32)	945	(25)
Other Comprehensive Income (Loss), before Reclassifications, before Tax			875
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax			0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (138)	$ 0	(187)	$ 0
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, before Tax			0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			(187)
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax			0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax			0
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax			6
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent			$ 6