Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) $ in Thousands	Oct. 04, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 512,645
Gross unrealized gains	527
Gross unrealized losses	(1,026)
Fair value	512,146
Treasury Bills | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	82,334
Gross unrealized gains	67
Gross unrealized losses	0
Fair value	82,401
Treasury Bills | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	16,521
Gross unrealized gains	59
Gross unrealized losses	0
Fair value	16,580
Euro Liquidity Fund | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	63,667
Gross unrealized gains	5
Gross unrealized losses	0
Fair value	63,672
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(51)
Asset-Backed Securities | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	60,989
Gross unrealized gains	20
Gross unrealized losses	(17)
Fair value	60,992
Asset-Backed Securities | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	28,257
Gross unrealized gains	31
Gross unrealized losses	(34)
Fair value	28,254
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(975)
Corporate Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	45,182
Gross unrealized gains	56
Gross unrealized losses	(68)
Fair value	45,170
Corporate Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	182,509
Gross unrealized gains	240
Gross unrealized losses	(907)
Fair value	181,842
Agency Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	10,979
Gross unrealized gains	1
Gross unrealized losses	0
Fair value	10,980
Agency Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,299
Gross unrealized gains	1
Gross unrealized losses	0
Fair value	3,300
Sovereign Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	7,561
Gross unrealized gains	7
Gross unrealized losses	0
Fair value	7,568
Sovereign Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	4,696
Gross unrealized gains	6
Gross unrealized losses	0
Fair value	4,702
Municipal Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,800
Gross unrealized gains	1
Gross unrealized losses	0
Fair value	1,801
Municipal Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	4,851
Gross unrealized gains	33
Gross unrealized losses	0
Fair value	$ 4,884