Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) $ in Thousands	Mar. 29, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months	$ 321,472
Unrealized losses, less than 12 months	(7,991)
Fair value, 12 months or greater	4,612
Unrealized losses, 12 months or greater	(57)
Total fair value	326,084
Total unrealized losses	(8,048)
Agency Bonds
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months	3,123
Unrealized losses, less than 12 months	(6)
Fair value, 12 months or greater	2,792
Unrealized losses, 12 months or greater	(9)
Total fair value	5,915
Total unrealized losses	(15)
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months	195,755
Unrealized losses, less than 12 months	(6,337)
Fair value, 12 months or greater	1,146
Unrealized losses, 12 months or greater	(44)
Total fair value	196,901
Total unrealized losses	(6,381)
Asset-Backed Securities
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months	108,932
Unrealized losses, less than 12 months	(1,640)
Fair value, 12 months or greater	674
Unrealized losses, 12 months or greater	(4)
Total fair value	109,606
Total unrealized losses	(1,644)
Sovereign Bonds
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months	13,662
Unrealized losses, less than 12 months	(8)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	13,662
Total unrealized losses	$ (8)