Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) $ in Thousands	Oct. 02, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 642,999
Gross unrealized gains	1,457
Gross unrealized losses	(151)
Fair value	644,305
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(19)
Treasury Bills | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	36,704
Gross unrealized gains	27
Gross unrealized losses	(3)
Fair value	36,728
Treasury Bills | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	70,535
Gross unrealized gains	60
Gross unrealized losses	(16)
Fair value	70,579
Euro Liquidity Fund | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	49,256
Gross unrealized gains	330
Gross unrealized losses	0
Fair value	49,586
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(11)
Asset-Backed Securities | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	64,696
Gross unrealized gains	49
Gross unrealized losses	(5)
Fair value	64,740
Asset-Backed Securities | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	38,716
Gross unrealized gains	72
Gross unrealized losses	(6)
Fair value	38,782
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(108)
Corporate Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	134,232
Gross unrealized gains	56
Gross unrealized losses	(43)
Fair value	134,245
Corporate Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	162,826
Gross unrealized gains	773
Gross unrealized losses	(65)
Fair value	163,534
Agency Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	4,900
Gross unrealized gains	4
Gross unrealized losses	0
Fair value	4,904
Agency Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	18,610
Gross unrealized gains	38
Gross unrealized losses	0
Fair value	18,648
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(13)
Sovereign Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	28,719
Gross unrealized gains	5
Gross unrealized losses	(4)
Fair value	28,720
Sovereign Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	24,362
Gross unrealized gains	31
Gross unrealized losses	(9)
Fair value	24,384
Municipal Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	9,443
Gross unrealized gains	12
Gross unrealized losses	0
Fair value	$ 9,455