Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 419,076
Gross Unrealized Gains	981
Gross Unrealized Losses	(320)
Fair Value	419,737
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(98)
Corporate Bonds | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	33,480
Gross Unrealized Gains	105
Gross Unrealized Losses	0
Fair Value	33,585
Corporate Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	190,185
Gross Unrealized Gains	680
Gross Unrealized Losses	(98)
Fair Value	190,767
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(65)
Asset-Backed Securities | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	410
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	410
Asset-Backed Securities | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	74,471
Gross Unrealized Gains	69
Gross Unrealized Losses	(65)
Fair Value	74,475
Municipal Bonds | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,758
Gross Unrealized Gains	8
Gross Unrealized Losses	0
Fair Value	4,766
Municipal Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,968
Gross Unrealized Gains	45
Gross Unrealized Losses	0
Fair Value	7,013
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(139)
Treasury Bills | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	86,941
Gross Unrealized Gains	2
Gross Unrealized Losses	(139)
Fair Value	86,804
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(18)
Sovereign Bonds | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,996
Gross Unrealized Gains	20
Gross Unrealized Losses	0
Fair Value	3,016
Sovereign Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,367
Gross Unrealized Gains	52
Gross Unrealized Losses	(18)
Fair Value	17,401
Agency Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,500
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	$ 1,500