Balance Sheet Components - Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	9 Months Ended
	Sep. 29, 2018 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 823,963
Other comprehensive income (loss) before reclassifications	6,692
Amounts reclassified from AOCI	(3,350)
Net change, net of tax	3,342
Balance, end of period	694,721
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(9)
Balance, end of period	3,333
Unrealized Gains (Losses) on Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	66
Other comprehensive income (loss) before reclassifications	6,780
Amounts reclassified from AOCI	(3,362)
Net change, net of tax	3,418
Balance, end of period	3,484
Currency Translation Adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	0
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from AOCI	0
Net change, net of tax	0
Balance, end of period	0
Unrealized Gains (Losses) on Available-for-Sale Investments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(75)
Other comprehensive income (loss) before reclassifications	(88)
Amounts reclassified from AOCI	12
Net change, net of tax	(76)
Balance, end of period	$ (151)