Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 164,659
Unrealized Losses, Less than 12 Months	(293)
Fair Value, 12 Months or Greater	8,456
Unrealized Losses, 12 Months or Greater	(27)
Total Fair Value	173,115
Total Unrealized Losses	(320)
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	55,024
Unrealized Losses, Less than 12 Months	(98)
Fair Value, 12 Months or Greater	0
Unrealized Losses, 12 Months or Greater	0
Total Fair Value	55,024
Total Unrealized Losses	(98)
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	23,535
Unrealized Losses, Less than 12 Months	(38)
Fair Value, 12 Months or Greater	8,456
Unrealized Losses, 12 Months or Greater	(27)
Total Fair Value	31,991
Total Unrealized Losses	(65)
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	3,347
Unrealized Losses, Less than 12 Months	(18)
Fair Value, 12 Months or Greater	0
Unrealized Losses, 12 Months or Greater	0
Total Fair Value	3,347
Total Unrealized Losses	(18)
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	82,753
Unrealized Losses, Less than 12 Months	(139)
Fair Value, 12 Months or Greater	0
Unrealized Losses, 12 Months or Greater	0
Total Fair Value	82,753
Total Unrealized Losses	$ (139)