Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) $ in Thousands	Apr. 02, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	$ 276,559
Unrealized losses, less than 12 months	(672)
Fair value, 12 months or greater	4,010
Unrealized losses, 12 months or greater	(2)
Total fair value	280,569
Total unrealized losses	(674)
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	113,462
Unrealized losses, less than 12 months	(246)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	113,462
Total unrealized losses	(246)
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	90,190
Unrealized losses, less than 12 months	(286)
Fair value, 12 months or greater	1,049
Unrealized losses, 12 months or greater	(1)
Total fair value	91,239
Total unrealized losses	(287)
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	45,185
Unrealized losses, less than 12 months	(37)
Fair value, 12 months or greater	2,961
Unrealized losses, 12 months or greater	(1)
Total fair value	48,146
Total unrealized losses	(38)
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	27,722
Unrealized losses, less than 12 months	(103)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	27,722
Total unrealized losses	$ (103)